1 00:00:15,370 --> 00:00:23,330 Speaker 1: Pushkin. In the first two episodes of our three part 2 00:00:23,450 --> 00:00:26,170 Speaker 1: series on the Race for the Pole, we heard about 3 00:00:26,170 --> 00:00:29,770 Speaker 1: how the British Navy Captain Robert Falcon Scott raced the 4 00:00:29,890 --> 00:00:34,650 Speaker 1: Norwegian adventurer Roald Amunson to the South Pole, and why 5 00:00:34,770 --> 00:00:39,010 Speaker 1: Scott had lost that race. But there's one mysterious feature 6 00:00:39,050 --> 00:00:42,050 Speaker 1: of that race that we've barely discussed, and one which 7 00:00:42,130 --> 00:00:46,050 Speaker 1: raises a much broader question. What's it like to learn 8 00:00:46,090 --> 00:00:49,130 Speaker 1: a vital lesson and then to lose your grip on 9 00:00:49,170 --> 00:00:53,610 Speaker 1: that lesson? Why does hard one knowledge sometimes melt away 10 00:00:53,650 --> 00:00:57,450 Speaker 1: in front of us? And so I present a third 11 00:00:57,530 --> 00:01:00,890 Speaker 1: perspective on the race to the Pole, this one, if 12 00:01:00,930 --> 00:01:04,530 Speaker 1: you'll forgive the phrase, is served with a twist of lime. 13 00:01:07,010 --> 00:01:13,090 Speaker 1: February nineteen twelve, and bitterly cold, the Antarctic summer was 14 00:01:13,170 --> 00:01:17,090 Speaker 1: beginning its turn to winter. At Ross Island, just off 15 00:01:17,090 --> 00:01:20,850 Speaker 1: the Antarctic coast, the sixty five men of Scott's British 16 00:01:20,850 --> 00:01:24,410 Speaker 1: expedition had established a base for exploring the continent and 17 00:01:24,530 --> 00:01:28,970 Speaker 1: conducting scientific experiments, and of course, for a thrust to 18 00:01:29,010 --> 00:01:32,690 Speaker 1: reach the South Pole itself. It was from this base 19 00:01:32,810 --> 00:01:36,530 Speaker 1: that Captain Scott's polar party had begun that epic journey 20 00:01:36,650 --> 00:01:39,250 Speaker 1: three months earlier, at the beginning of the southern summer. 21 00:01:40,210 --> 00:01:44,090 Speaker 1: Now the men at the base were eagerly awaiting his return. 22 00:01:45,770 --> 00:01:49,610 Speaker 1: On the nineteenth of February, one of Scott's team staggered 23 00:01:49,650 --> 00:01:54,890 Speaker 1: into the base camp, exhausted, snow blind, and dehydrated. The 24 00:01:55,010 --> 00:01:59,530 Speaker 1: solitary man Petty Officer Tom Crean reported that Captain Scott 25 00:01:59,570 --> 00:02:01,970 Speaker 1: had sent the three of them back six weeks ago 26 00:02:02,530 --> 00:02:05,890 Speaker 1: before his final push to the pole. The three had 27 00:02:05,930 --> 00:02:08,650 Speaker 1: almost made it back to the base, and Tom Crean 28 00:02:08,770 --> 00:02:12,810 Speaker 1: had arched the last thirty miles alone to fetch help. 29 00:02:13,650 --> 00:02:17,250 Speaker 1: Back Out on the ice were his two companions. One 30 00:02:17,290 --> 00:02:23,050 Speaker 1: of them, Lieutenant Teddy Evans, was desperately ill. Grimmer and Grimmer. 31 00:02:23,130 --> 00:02:26,170 Speaker 1: Diary entries from one of the trio tell the story, 32 00:02:27,010 --> 00:02:30,210 Speaker 1: mister Evans is turning black and blue, and several other 33 00:02:30,290 --> 00:02:35,090 Speaker 1: colors as well. Mister Evans is gradually worse. It's no 34 00:02:35,250 --> 00:02:38,930 Speaker 1: use closing our eyes to the fact. Mister Evans is 35 00:02:38,970 --> 00:02:42,090 Speaker 1: no better, but seems to be in great pain, but 36 00:02:42,370 --> 00:02:46,570 Speaker 1: he keeps quite cheerful. This morning we were forced to 37 00:02:46,610 --> 00:02:49,210 Speaker 1: put mister Evans on his ski and strap him on 38 00:02:49,490 --> 00:02:53,130 Speaker 1: as he could not lift his legs. Mister Evans is 39 00:02:53,170 --> 00:02:56,770 Speaker 1: in a very bad state. If this is scurvy, I'm 40 00:02:56,810 --> 00:03:01,290 Speaker 1: sorry for anyone's at tafts. Was it a case of scurvy? 41 00:03:01,810 --> 00:03:08,450 Speaker 1: Of course, bleeding gums, severe joint pain, bruising new wounds, 42 00:03:08,450 --> 00:03:13,290 Speaker 1: won't heal, old scars start to reopen. There was no doubt. 43 00:03:14,130 --> 00:03:16,650 Speaker 1: A mission was soon on its way to fetch the 44 00:03:16,730 --> 00:03:20,650 Speaker 1: pair out on the ice. Evans and his companion heard 45 00:03:20,690 --> 00:03:24,050 Speaker 1: the welcome barking of sled dogs coming to the rescue. 46 00:03:24,570 --> 00:03:31,490 Speaker 1: Evans would live. But how had Teddy Evans contracted a 47 00:03:31,530 --> 00:03:36,090 Speaker 1: case of scurvy? This was a British naval expedition in 48 00:03:36,130 --> 00:03:39,650 Speaker 1: the twentieth century. Hadn't the British Navy known how to 49 00:03:39,650 --> 00:03:43,290 Speaker 1: prevent scurvy for more than a century? They were nicknamed 50 00:03:43,490 --> 00:03:45,770 Speaker 1: lime Is because they were never far from a serving 51 00:03:45,810 --> 00:03:50,970 Speaker 1: of lime juice. Had they simply forgotten? British Navy Captain 52 00:03:51,090 --> 00:03:55,450 Speaker 1: Robert Falcon Scott wasn't available to answer the question. He 53 00:03:55,730 --> 00:03:59,770 Speaker 1: and his four companions were somewhere in the heart of Antarctica, 54 00:04:00,290 --> 00:04:04,610 Speaker 1: with a midnight sun sinking low as winter approached. An 55 00:04:04,650 --> 00:04:08,730 Speaker 1: awful threat hung over him. Teddy Evans had traveled with 56 00:04:08,810 --> 00:04:12,610 Speaker 1: Rob Scott for hundreds of miles, eating the same food 57 00:04:13,050 --> 00:04:17,130 Speaker 1: prepared in the same way. If Teddy Evans was barely 58 00:04:17,170 --> 00:04:21,170 Speaker 1: beginning to recover from a crippling case of scurvy, what 59 00:04:21,250 --> 00:04:23,850 Speaker 1: was happening to the group that had forged on towards 60 00:04:23,850 --> 00:04:29,770 Speaker 1: the South Pole with Robert Scott. I'm Tim Harford, and 61 00:04:29,890 --> 00:04:54,770 Speaker 1: you're listening to cautionary tales. Here's a description of scurvy 62 00:04:55,250 --> 00:04:59,370 Speaker 1: written eight hundred years ago. With violent pains in the 63 00:04:59,450 --> 00:05:04,250 Speaker 1: feet and ankles, their gums become swollen, their teeth loose 64 00:05:04,450 --> 00:05:09,410 Speaker 1: and useless, while their hips and shin bones first turned 65 00:05:09,410 --> 00:05:16,730 Speaker 1: black and putrefied. Finally, an easy and peaceful death, like 66 00:05:16,770 --> 00:05:21,850 Speaker 1: a gentle sleep, put an end to their suffering. Scurvy 67 00:05:22,050 --> 00:05:25,890 Speaker 1: was most common on long sea voyages. On Vasco da 68 00:05:25,890 --> 00:05:30,010 Speaker 1: Gama's expedition to India in fourteen ninety nine, he lost 69 00:05:30,130 --> 00:05:35,010 Speaker 1: two men out of every three to scurvy. Magellan suffered 70 00:05:35,050 --> 00:05:39,250 Speaker 1: even heavier losses four men out of every five as 71 00:05:39,250 --> 00:05:44,010 Speaker 1: he forged across the Pacific in fifteen twenty. In sixteen twenty, 72 00:05:44,450 --> 00:05:48,210 Speaker 1: nearly half the people on the Mayflower died, most of 73 00:05:48,250 --> 00:05:54,370 Speaker 1: them from scurvy. It was merciless, but eventually a British 74 00:05:54,450 --> 00:06:00,050 Speaker 1: naval surgeon named James Lynde, traveling aboard HMS Salisbury, conducted 75 00:06:00,090 --> 00:06:03,410 Speaker 1: what is now celebrated as one of the first controlled 76 00:06:03,450 --> 00:06:09,010 Speaker 1: clinical trials. On the twentieth of May seventeen forty seven. 77 00:06:09,130 --> 00:06:12,410 Speaker 1: I took twelve patients in the scurvy on board the 78 00:06:12,450 --> 00:06:15,490 Speaker 1: Salisbury at sea. Their cases were as similar as I 79 00:06:15,530 --> 00:06:19,250 Speaker 1: could have them. They all in general had putrid gums, 80 00:06:19,610 --> 00:06:24,890 Speaker 1: the spots, and lassitude, with weakness of their knees. Lynde 81 00:06:24,890 --> 00:06:28,090 Speaker 1: divided the men into six pairs and gave them each 82 00:06:28,130 --> 00:06:31,370 Speaker 1: the same diet, plus a different treatment for each pair. 83 00:06:32,050 --> 00:06:36,090 Speaker 1: Each treatment had been recommended by some esteemed doctor, which 84 00:06:36,250 --> 00:06:39,250 Speaker 1: is to say, given the state of medical science, some 85 00:06:39,490 --> 00:06:43,450 Speaker 1: highly decorated quack. Two of these were ordered each a 86 00:06:43,570 --> 00:06:47,610 Speaker 1: quart of cider a day. Lovely hard cider, but it's 87 00:06:47,610 --> 00:06:51,770 Speaker 1: not going to cure scurvy. Two others took twenty five 88 00:06:51,890 --> 00:06:55,090 Speaker 1: guts of elixir vitriol three times a day upon an 89 00:06:55,090 --> 00:07:00,450 Speaker 1: empty stomach. That's seventy five drops a day of sulfuric acid. 90 00:07:01,610 --> 00:07:04,850 Speaker 1: Two others took two spoonfuls of vinegar three times a 91 00:07:04,930 --> 00:07:08,490 Speaker 1: day upon an empty stomach. Then there were the poor 92 00:07:08,490 --> 00:07:11,730 Speaker 1: fellows give half a pint of sea water. Others got 93 00:07:11,730 --> 00:07:16,050 Speaker 1: a paste of garlic, mustard, horseradish, and aromatic plant extracts, 94 00:07:16,050 --> 00:07:20,010 Speaker 1: which sounds a little too zesty. None of this was 95 00:07:20,210 --> 00:07:25,810 Speaker 1: any help whatsoever. But the final pair got two oranges 96 00:07:25,850 --> 00:07:29,250 Speaker 1: and a lemon each day for six days, at which 97 00:07:29,250 --> 00:07:34,450 Speaker 1: point they had made a miraculous recovery and m Salisbury 98 00:07:34,530 --> 00:07:37,090 Speaker 1: had run out of fruit, which is rather a shame 99 00:07:37,170 --> 00:07:43,210 Speaker 1: for everyone else. Lynd is celebrated as a pioneer of 100 00:07:43,290 --> 00:07:46,730 Speaker 1: clinical trials. He's also remembered as the man who figured 101 00:07:46,730 --> 00:07:50,690 Speaker 1: out how to prevent scurvy. But the story, as we'll see, 102 00:07:51,130 --> 00:07:55,890 Speaker 1: isn't that tidy. Lynd certainly didn't understand what we understand today, 103 00:07:56,410 --> 00:07:59,010 Speaker 1: which is that scurvy is an illness caused by a 104 00:07:59,090 --> 00:08:02,610 Speaker 1: lack of a certain chemical in the body, a scorbic acid, 105 00:08:03,050 --> 00:08:06,410 Speaker 1: also known as vitamin C. It's present in lots of 106 00:08:06,450 --> 00:08:12,730 Speaker 1: fresh foods, and particularly oranges and lemons. Vitamin C itself 107 00:08:12,850 --> 00:08:17,090 Speaker 1: wasn't identified and isolated until the nineteen thirties. In nineteen 108 00:08:17,130 --> 00:08:21,530 Speaker 1: thirty nine, John Crandon, a young doctor at Boston City Hospital, 109 00:08:22,010 --> 00:08:25,530 Speaker 1: deprived himself of vitamin C just to see what would happen. 110 00:08:26,290 --> 00:08:31,810 Speaker 1: The answer after two months was nothing. Doctor Crandon was 111 00:08:31,890 --> 00:08:36,810 Speaker 1: just fine, but then fatigue started to set in. Week 112 00:08:37,050 --> 00:08:41,650 Speaker 1: by week, Crandon became ever more exhausted, but he was 113 00:08:41,690 --> 00:08:46,490 Speaker 1: determined to persist with his experiment. Six months in, Crandon's 114 00:08:46,570 --> 00:08:50,410 Speaker 1: skin started to bleed around his follicles. He tested his 115 00:08:50,530 --> 00:08:53,770 Speaker 1: endurance by gently jogging on a treadmill set at a 116 00:08:53,850 --> 00:08:59,290 Speaker 1: leisurely pace. He lasted just sixteen seconds, during which time 117 00:08:59,530 --> 00:09:03,290 Speaker 1: he covered just fifty yards. It was amazing that he 118 00:09:03,330 --> 00:09:06,970 Speaker 1: could move at all. A scar from an old operation 119 00:09:07,290 --> 00:09:13,530 Speaker 1: was disintegrating. The fifteen year old wound was reopening. Crandon's 120 00:09:13,570 --> 00:09:18,650 Speaker 1: remarkable experiment was about to end. To prevent it from 121 00:09:18,770 --> 00:09:23,770 Speaker 1: ending in tragedy, Crandon's colleagues staged an intervention for his 122 00:09:23,810 --> 00:09:28,410 Speaker 1: own good. They administered intravenous vitamin C and he recovered. 123 00:09:29,490 --> 00:09:33,650 Speaker 1: Two months without vitamin C had seemed fine, but after 124 00:09:33,730 --> 00:09:43,290 Speaker 1: that Crandon's body had started to slowly fall apart. Out 125 00:09:43,370 --> 00:09:48,090 Speaker 1: on the Antarctic ice. In January nineteen twelve, Scott and 126 00:09:48,170 --> 00:09:52,370 Speaker 1: his small team were nearing the South Pole. Scott's four 127 00:09:52,410 --> 00:09:58,650 Speaker 1: companions were Henry Birdie Bowers Lawrence Titus Oates, doctor Edward Wilson, 128 00:09:59,090 --> 00:10:03,370 Speaker 1: and another Evans, Edgar Evans. Everyone else who had set 129 00:10:03,370 --> 00:10:06,610 Speaker 1: out on the journey helping to pull sledges and established 130 00:10:06,650 --> 00:10:11,130 Speaker 1: depots of food had been sent back to Scott's group 131 00:10:11,170 --> 00:10:14,730 Speaker 1: had been dragging their sledges for two months, who sometimes 132 00:10:14,770 --> 00:10:18,890 Speaker 1: brutal conditions, but with seven hundred miles completed and one 133 00:10:18,930 --> 00:10:22,490 Speaker 1: hundred and fifty miles to the pole, Scott's diary reveals 134 00:10:22,490 --> 00:10:26,010 Speaker 1: a fine mood at present. Everything seems to be going 135 00:10:26,010 --> 00:10:30,890 Speaker 1: with extraordinary smoothness. We feel the cold very little. The 136 00:10:30,970 --> 00:10:34,730 Speaker 1: great comfort of our situation is the excellent drying effect 137 00:10:34,770 --> 00:10:39,450 Speaker 1: of the sun. Our food continues to amply satisfy. What 138 00:10:39,690 --> 00:10:42,930 Speaker 1: luck to have hit on such an excellent ration. We 139 00:10:43,010 --> 00:10:49,010 Speaker 1: really are an excellently found party. We lie so very comfortably, 140 00:10:49,490 --> 00:10:53,850 Speaker 1: warmly clothed in our comfortable bags within our double walled tent. 141 00:10:55,650 --> 00:10:59,130 Speaker 1: Things could hardly have been going better. Scott and his 142 00:10:59,210 --> 00:11:01,850 Speaker 1: men had been away from their base for two months, 143 00:11:02,570 --> 00:11:08,170 Speaker 1: and then something happened. That's the writer and polar explorer, 144 00:11:08,330 --> 00:11:11,810 Speaker 1: absolutely Cherry Garrard. He wasn't one of the five men 145 00:11:11,930 --> 00:11:15,250 Speaker 1: who made that final push towards the south Pole, But 146 00:11:15,410 --> 00:11:18,650 Speaker 1: in his book The Worst Journey in the World, he 147 00:11:18,770 --> 00:11:22,530 Speaker 1: tries to piece together where it all went wrong. One day, 148 00:11:22,770 --> 00:11:28,450 Speaker 1: everything's fine, extraordinary smoothness, amply, satisfying rations, warm and comfortable. 149 00:11:29,010 --> 00:11:34,250 Speaker 1: Days later, Scott's diary entries describe an expedition coming apart 150 00:11:34,290 --> 00:11:38,210 Speaker 1: of the seams. The weather seems intolerably cold. They can't 151 00:11:38,250 --> 00:11:42,370 Speaker 1: bear it. Yet objectively speaking, the weather is not so bad. 152 00:11:43,130 --> 00:11:46,850 Speaker 1: The problem is the men. I believe the party was 153 00:11:46,890 --> 00:11:48,690 Speaker 1: not as fit at this time as might have been 154 00:11:48,690 --> 00:11:51,690 Speaker 1: expected ten days before, and that this was partly the 155 00:11:51,730 --> 00:11:54,370 Speaker 1: reason why they felt the cold and found the pulling 156 00:11:54,450 --> 00:11:58,370 Speaker 1: so hard. He's talking about mid January, the height of 157 00:11:58,410 --> 00:12:02,250 Speaker 1: the brief Antarctic summer. It's just over a week after 158 00:12:02,370 --> 00:12:07,730 Speaker 1: Scott's perky diary entry, yet everything is crumbling. A day later, 159 00:12:08,410 --> 00:12:12,690 Speaker 1: Scott's tea nears the South Pole and discovers that Amunson 160 00:12:12,890 --> 00:12:17,130 Speaker 1: has got their first Scott's group of five tiring men 161 00:12:17,810 --> 00:12:21,690 Speaker 1: simply turned and began to plod eight hundred and fifty 162 00:12:21,730 --> 00:12:26,930 Speaker 1: miles home again. And unlike doctor John Crandon, they didn't 163 00:12:26,970 --> 00:12:30,290 Speaker 1: have someone at the ready with a syringe of vitamin C. 164 00:12:37,970 --> 00:12:53,530 Speaker 1: Cautionary tales will return in a moment. So what exactly 165 00:12:53,650 --> 00:12:58,090 Speaker 1: did James Lynde discover back in seventeen forty seven, and 166 00:12:58,210 --> 00:13:01,610 Speaker 1: why wasn't Scott's expedition able to use that discovery to 167 00:13:01,650 --> 00:13:06,370 Speaker 1: prevent scurvy. Lynde had showed that oranges and lemons cured 168 00:13:06,410 --> 00:13:08,970 Speaker 1: scurvy in a way that appeals to our modern scent 169 00:13:09,090 --> 00:13:13,930 Speaker 1: sabilities a controlled clinical trial, but Lynde himself didn't seem 170 00:13:13,970 --> 00:13:17,290 Speaker 1: to appreciate quite what he had done. He wrote a 171 00:13:17,330 --> 00:13:21,050 Speaker 1: book about scurvy, which contained an admirably brief and clear 172 00:13:21,130 --> 00:13:24,370 Speaker 1: report of his clinical trial, but he surrounded it with 173 00:13:24,530 --> 00:13:28,970 Speaker 1: page after page of quack theories about excess perspiration or 174 00:13:29,010 --> 00:13:32,730 Speaker 1: the need for ventilation. And a particular problem was that 175 00:13:32,770 --> 00:13:36,010 Speaker 1: he recommended boiling the citrus juice into a syrup to 176 00:13:36,090 --> 00:13:39,610 Speaker 1: preserve it. Lynde never seems to have tested his own 177 00:13:39,650 --> 00:13:43,450 Speaker 1: citrus syrup, and if he had, it wouldn't have worked 178 00:13:43,850 --> 00:13:48,970 Speaker 1: because the long boiling process destroyed the vitamin C. The 179 00:13:49,090 --> 00:13:53,050 Speaker 1: Navy was not convinced by Lynde's book, but a few 180 00:13:53,050 --> 00:13:57,690 Speaker 1: decades later another doctor experimented with fresh lemon juice preserved 181 00:13:57,770 --> 00:14:00,770 Speaker 1: under a layer of olive oil and found that it worked. 182 00:14:01,570 --> 00:14:04,690 Speaker 1: His name was Gilbert Blaine and he was doctor to 183 00:14:04,770 --> 00:14:08,650 Speaker 1: the future King George the Fourth. With a royal doctor 184 00:14:08,730 --> 00:14:12,090 Speaker 1: making the case, the British Navy started to grow huge 185 00:14:12,170 --> 00:14:15,610 Speaker 1: quantities of lemons on the island of Sicily. By the 186 00:14:15,650 --> 00:14:22,210 Speaker 1: early eighteen hundreds, scurvy was eliminated, and yet in nineteen 187 00:14:22,250 --> 00:14:27,050 Speaker 1: twelve here was Captain Scott's expedition struck down with scurvy 188 00:14:27,090 --> 00:14:33,410 Speaker 1: once again. Our common sense model of discovery, invention and 189 00:14:33,530 --> 00:14:36,650 Speaker 1: innovation goes like this. We start at the bottom of 190 00:14:36,690 --> 00:14:40,170 Speaker 1: a deep hole of ignorance. Then some brilliant man like 191 00:14:40,370 --> 00:14:44,290 Speaker 1: James Lynde finds the rope of discovery and humanity, climbs 192 00:14:44,290 --> 00:14:47,530 Speaker 1: out of the hole and stands on firm ground, able 193 00:14:47,570 --> 00:14:52,850 Speaker 1: to scam the horizon of knowledge. But unless we understand 194 00:14:53,090 --> 00:14:57,050 Speaker 1: why something works, the ground underneath us isn't firm at all. 195 00:14:58,890 --> 00:15:02,250 Speaker 1: Lynde had simply assumed that if fresh citrus juice worked, 196 00:15:02,530 --> 00:15:07,090 Speaker 1: so too would boiled citrus juice. He was wrong, and 197 00:15:07,210 --> 00:15:09,490 Speaker 1: we now know that heat isn't the only thing that 198 00:15:09,570 --> 00:15:14,170 Speaker 1: destroys vitamin C, so does copper, which maybe why Navy 199 00:15:14,170 --> 00:15:17,290 Speaker 1: ships with big copper cooking pots were so plagued by 200 00:15:17,330 --> 00:15:20,930 Speaker 1: scurvy in the first place, so does light, which means 201 00:15:20,930 --> 00:15:23,290 Speaker 1: it's not a good idea to store citrus juice in 202 00:15:23,330 --> 00:15:26,450 Speaker 1: a glass bottle. None of this was clear to the 203 00:15:26,490 --> 00:15:31,890 Speaker 1: British Navy. In eighteen sixty, the Navy switched from juicy 204 00:15:31,930 --> 00:15:36,330 Speaker 1: Sicilian lemons to tart West Indian limes. A daily dose 205 00:15:36,410 --> 00:15:39,930 Speaker 1: of lime juice became synonymous with the British Navy, hence 206 00:15:39,970 --> 00:15:43,970 Speaker 1: the nickname lime Is. Most people assumed that the switch 207 00:15:44,050 --> 00:15:47,410 Speaker 1: to limes was just a cosmetic difference. One's yellow and 208 00:15:47,490 --> 00:15:51,610 Speaker 1: one's green, but they're basically the same zesty fruit. Today 209 00:15:51,970 --> 00:15:56,010 Speaker 1: we know that limes have considerably less vitamin sea than lemons. 210 00:15:57,170 --> 00:16:00,450 Speaker 1: The Navy was now relying on precautions against scurvy that 211 00:16:00,530 --> 00:16:03,930 Speaker 1: were no use at all, but for decades their lack 212 00:16:03,970 --> 00:16:08,250 Speaker 1: of understanding remained hidden for a simple reason. Over the 213 00:16:08,250 --> 00:16:11,810 Speaker 1: course of the eighteen hundreds, the Navy gradually switched from 214 00:16:11,890 --> 00:16:16,450 Speaker 1: sailing ships to steamships. The steamships traveled faster and needed 215 00:16:16,450 --> 00:16:19,090 Speaker 1: to stop for fuel, and when they did, they'd also 216 00:16:19,170 --> 00:16:23,090 Speaker 1: take on fresh food. Sailing ship journeys lasted for months. 217 00:16:23,770 --> 00:16:26,490 Speaker 1: Sailors on steamships rarely went for more than a few 218 00:16:26,490 --> 00:16:30,690 Speaker 1: weeks without eating some fresh food containing bittamin sea. And 219 00:16:30,810 --> 00:16:34,570 Speaker 1: remember the young doctor John Crandon, He still felt fine 220 00:16:34,610 --> 00:16:38,890 Speaker 1: after two months without vitamin sea. The Navy thought lime 221 00:16:38,930 --> 00:16:42,450 Speaker 1: juice was protecting their sailors. The truth was that they 222 00:16:42,490 --> 00:16:45,250 Speaker 1: simply weren't at sea for long enough to get scurvy 223 00:16:45,250 --> 00:16:51,330 Speaker 1: in the first place. Then, in eighteen seventy five, the 224 00:16:51,450 --> 00:16:55,370 Speaker 1: Navy dispatched two ships to find the North Pole. This 225 00:16:55,570 --> 00:17:00,130 Speaker 1: expedition was much longer than the average steamship journey. First, 226 00:17:00,170 --> 00:17:03,250 Speaker 1: the sledging party sent out over the pack ice was 227 00:17:03,330 --> 00:17:07,530 Speaker 1: struck by scurvy. A rescue party reached them an administered 228 00:17:07,570 --> 00:17:11,570 Speaker 1: lime juice. It didn't work. Back on the ship men 229 00:17:11,650 --> 00:17:14,850 Speaker 1: who took regular swigs of lime juice got scurvy too. 230 00:17:15,610 --> 00:17:19,770 Speaker 1: The ships withdrew, and the ignominious failure of the expedition 231 00:17:19,970 --> 00:17:24,810 Speaker 1: was a national embarrassment. The return of scurvy was a shock, 232 00:17:26,050 --> 00:17:29,330 Speaker 1: So was the failure of lime juice. Hadn't it been 233 00:17:29,490 --> 00:17:34,210 Speaker 1: preventing scurvy for years? If anyone had understood that the 234 00:17:34,330 --> 00:17:36,970 Speaker 1: long journey was the problem, they might have figured out 235 00:17:36,970 --> 00:17:41,090 Speaker 1: the solution, go back to basics with fresh Sicilian lemons. 236 00:17:41,970 --> 00:17:47,730 Speaker 1: But they didn't, and by unlucky coincidence, a rival hypothesis emerged. 237 00:17:48,090 --> 00:17:51,570 Speaker 1: Just as people were losing confidence in the lime juice cure, 238 00:17:52,690 --> 00:17:56,090 Speaker 1: Biologists were beginning to develop the theory of germs and 239 00:17:56,210 --> 00:18:00,970 Speaker 1: to understand the role of microbes in causing many diseases. Suddenly, 240 00:18:01,170 --> 00:18:05,010 Speaker 1: the idea of scurvy as a disease of deficiency seemed 241 00:18:05,530 --> 00:18:10,730 Speaker 1: less modern. An alternative theory rose to eminence, that scurvy 242 00:18:10,850 --> 00:18:15,410 Speaker 1: was caused by a toxin produced by bacteria. Here's doctor 243 00:18:15,410 --> 00:18:20,570 Speaker 1: Reginald Kurtletz, the senior doctor on Captain Scott's first polar expedition, 244 00:18:20,770 --> 00:18:23,490 Speaker 1: which took place a decade before the Race to the 245 00:18:23,530 --> 00:18:27,530 Speaker 1: South Pole. Kurtletz is writing in the British Medical journal 246 00:18:28,730 --> 00:18:32,610 Speaker 1: want of vegetables and fruit does not predisposed to nor 247 00:18:32,730 --> 00:18:39,810 Speaker 1: produce scurvy. Scurvy is chronic ptomaine poisoning. Such ideas were 248 00:18:39,850 --> 00:18:44,170 Speaker 1: widely shared by the medical profession. Potomaine described an invisible 249 00:18:44,250 --> 00:18:48,650 Speaker 1: toxin that comes from rotting food. Eat fresh food instead, 250 00:18:48,890 --> 00:18:51,690 Speaker 1: and the toxic potomain would soon be flushed out of 251 00:18:51,690 --> 00:18:55,970 Speaker 1: the system. It all makes perfect sense. The problem is 252 00:18:56,010 --> 00:19:01,210 Speaker 1: that potomaine doesn't exist, and trying to protect yourself against 253 00:19:01,290 --> 00:19:05,850 Speaker 1: something that doesn't exist can be maddening. Here's Captain Scott 254 00:19:05,890 --> 00:19:09,370 Speaker 1: in nineteen o two when an early Antarctic mission was 255 00:19:09,450 --> 00:19:13,490 Speaker 1: struck by scurvy. Whence it has come, or why it 256 00:19:13,610 --> 00:19:16,330 Speaker 1: has come with all the precautions that have been taken, 257 00:19:17,090 --> 00:19:21,250 Speaker 1: is beyond our ability to explain the evil having come. 258 00:19:21,890 --> 00:19:25,650 Speaker 1: The great thing now is to banish it. It's a 259 00:19:25,770 --> 00:19:30,930 Speaker 1: revealing passage. Scott and his advisers, including doctor Kirtlitz, know 260 00:19:31,130 --> 00:19:34,330 Speaker 1: what scurvy is and how dangerous it can be. A 261 00:19:34,370 --> 00:19:37,050 Speaker 1: few decades earlier they would also have known how to 262 00:19:37,130 --> 00:19:41,490 Speaker 1: cure it lemons, but now they think there might be 263 00:19:41,570 --> 00:19:46,250 Speaker 1: some kind of bacteria involved. Where's it coming from? Scott 264 00:19:46,330 --> 00:19:49,250 Speaker 1: was reduced to throwing the kitchen sink at the problem, 265 00:19:49,730 --> 00:19:53,250 Speaker 1: serving out fresh meat regularly, and by increasing the allowance 266 00:19:53,290 --> 00:19:56,490 Speaker 1: of bottled fruits, giving everyone on the mess deck a 267 00:19:56,650 --> 00:19:59,610 Speaker 1: change of air. In turn, we've had a thorough clearance 268 00:19:59,650 --> 00:20:03,170 Speaker 1: of the holds, disinfected the bilges, whitewashed the sides and 269 00:20:03,370 --> 00:20:06,250 Speaker 1: generally made them sweet and clean. As an extep I 270 00:20:06,290 --> 00:20:09,050 Speaker 1: tackled the clothes and hammocks. We've had them all thorough. 271 00:20:09,130 --> 00:20:11,690 Speaker 1: The aired we've cleared all the deck lights so as 272 00:20:11,690 --> 00:20:14,570 Speaker 1: to get more daylight below, and we've scrubbed the decks 273 00:20:14,610 --> 00:20:17,370 Speaker 1: and cleaned out all the holes and corners, until everything 274 00:20:17,450 --> 00:20:20,050 Speaker 1: is as clean as a new pin. We found very 275 00:20:20,130 --> 00:20:24,370 Speaker 1: little dirt, but now we do everything for the safe side, 276 00:20:24,610 --> 00:20:27,930 Speaker 1: and from the conviction that one cannot be too careful. 277 00:20:28,650 --> 00:20:31,930 Speaker 1: In other words, Scott just didn't know how to protect 278 00:20:31,930 --> 00:20:35,250 Speaker 1: his men from scurvy. He hadn't entirely given up on 279 00:20:35,370 --> 00:20:38,170 Speaker 1: bottled fruits, but maybe it was fresh meat that would 280 00:20:38,170 --> 00:20:41,810 Speaker 1: produce a cure or daylight. All he knew was that 281 00:20:41,890 --> 00:20:47,010 Speaker 1: after trying everything, the scurvy went away. Then he ventured 282 00:20:47,050 --> 00:20:49,810 Speaker 1: out on a long sledging journey with his colleague and 283 00:20:49,890 --> 00:20:54,330 Speaker 1: rival Ernest Shackleton, aiming to scout out a route towards 284 00:20:54,370 --> 00:20:59,250 Speaker 1: the South Pole for some future expedition. It was a disaster. 285 00:20:59,290 --> 00:21:03,490 Speaker 1: Everyone came down with scurvy, Shackleton worst of all, coughing 286 00:21:03,570 --> 00:21:06,170 Speaker 1: up blood. They barely made it back to the base 287 00:21:06,210 --> 00:21:12,090 Speaker 1: camp alive. Similar troubles befell other expeditions, British and otherwise, 288 00:21:12,450 --> 00:21:16,690 Speaker 1: both in the Arctic and the Antarctic. Scurvy struck again 289 00:21:17,370 --> 00:21:26,370 Speaker 1: and again and again and nobody knew why. February nineteen twelve, 290 00:21:27,450 --> 00:21:32,770 Speaker 1: Scott Bowers, Evans, Oates, and Wilson are plodding back towards 291 00:21:32,770 --> 00:21:39,410 Speaker 1: their base camp. They're subdued, tired and vulnerable. Wilson had 292 00:21:39,450 --> 00:21:43,290 Speaker 1: strained attendon two weeks before. I got a nasty bruise 293 00:21:43,450 --> 00:21:47,090 Speaker 1: on the tibialis anacus, which gave me great pain all afternoon. 294 00:21:47,970 --> 00:21:52,290 Speaker 1: I gave Birdie Bowers my ski and hobbled alongside the 295 00:21:52,330 --> 00:21:56,170 Speaker 1: sledge on foot. It still hasn't healed, and they're all 296 00:21:56,170 --> 00:21:59,690 Speaker 1: prone to injury now. Evans is the weakest of them all. 297 00:22:00,330 --> 00:22:03,810 Speaker 1: Evans got his nose frost, but not an unusual thing 298 00:22:03,850 --> 00:22:07,050 Speaker 1: with him, but we were all getting pretty cold latterly. 299 00:22:07,610 --> 00:22:12,370 Speaker 1: Frostbite is no joke. Tissue freezes, the blood supply can't 300 00:22:12,370 --> 00:22:16,210 Speaker 1: get through. It's painful, and the frost bitten body parts 301 00:22:16,250 --> 00:22:21,690 Speaker 1: can quickly die and start to rot. Here's Scott's diary 302 00:22:21,810 --> 00:22:24,850 Speaker 1: from the same day. There is no doubt Evans is 303 00:22:24,890 --> 00:22:28,970 Speaker 1: a good deal run down. His fingers are badly blistered 304 00:22:29,610 --> 00:22:33,490 Speaker 1: and his nose is rather seriously congested with frequent frostbites. 305 00:22:34,130 --> 00:22:36,770 Speaker 1: He is very much annoyed with himself, which is not 306 00:22:36,850 --> 00:22:40,290 Speaker 1: a good sign. Then it was Scott's turn to get 307 00:22:40,290 --> 00:22:44,130 Speaker 1: injured on a very slippery surface. I came an often 308 00:22:44,570 --> 00:22:48,410 Speaker 1: parler on my shoulder. It is horribly sore to night, 309 00:22:48,970 --> 00:22:52,770 Speaker 1: and another sick person added to our tent. Three out 310 00:22:52,770 --> 00:22:56,570 Speaker 1: of five inchured. Bowers was looking on the bright side. 311 00:22:56,930 --> 00:23:01,330 Speaker 1: Otherwise we are all well but thinning. They're not getting 312 00:23:01,410 --> 00:23:05,570 Speaker 1: enough food and in particular they're not getting enough bitten 313 00:23:05,650 --> 00:23:10,090 Speaker 1: in C. Of course, in nineteen twelve, nobody knows what 314 00:23:10,210 --> 00:23:14,650 Speaker 1: vitamin C is, but there was another recent discovery that 315 00:23:14,810 --> 00:23:21,170 Speaker 1: might have saved Captain Scott's expedition. We'll find out what 316 00:23:21,250 --> 00:23:34,810 Speaker 1: it was after the break Vitamin C, as we've heard, 317 00:23:35,210 --> 00:23:39,610 Speaker 1: wasn't discovered until the nineteen thirties, but the key modern 318 00:23:39,650 --> 00:23:43,210 Speaker 1: breakthrough in understanding scurvy was made in nineteen oh seven, 319 00:23:43,530 --> 00:23:46,690 Speaker 1: a full three years before Captain Scott left Europe for 320 00:23:46,770 --> 00:23:50,930 Speaker 1: his ill fated antarctical expedition. The discovery was made by 321 00:23:50,970 --> 00:23:57,210 Speaker 1: two Norwegian scientists, Axel Holst and Theodore Freulich. By chance, 322 00:23:57,730 --> 00:24:02,450 Speaker 1: Holston Freulich discovered that guinea pigs could develop scurvy. This 323 00:24:02,650 --> 00:24:07,010 Speaker 1: was a surprise. Holston Freulick realized that scurvy wasn't a 324 00:24:07,050 --> 00:24:10,690 Speaker 1: disease of humans. It was a disease of humans and 325 00:24:11,090 --> 00:24:14,450 Speaker 1: guinea pigs. And from there it was simple to run 326 00:24:14,490 --> 00:24:18,330 Speaker 1: experiments by controlling the feeding of guinea pigs and seeing 327 00:24:18,370 --> 00:24:23,010 Speaker 1: which ones of them developed scurvy. The results were definitive. 328 00:24:23,610 --> 00:24:26,810 Speaker 1: The experiments on guinea pigs confirmed that scurvy was not 329 00:24:27,050 --> 00:24:31,170 Speaker 1: caused by ptomaine poisoning, but by a deficiency of some 330 00:24:31,250 --> 00:24:34,810 Speaker 1: sort of nutrient, Just as James Lynde and Gilbert Blaine 331 00:24:34,850 --> 00:24:39,250 Speaker 1: had thought all those years ago, Holston Furlick knew they're 332 00:24:39,290 --> 00:24:43,370 Speaker 1: discovered something important for polar expeditions, which were being struck 333 00:24:43,410 --> 00:24:47,290 Speaker 1: down by scurvy time and time again. They warned the 334 00:24:47,370 --> 00:24:51,170 Speaker 1: polar explorer Fritchoff Nansen, who was giving advice to Scott 335 00:24:51,210 --> 00:24:55,810 Speaker 1: and his great rival, Rolled Amunson. But Nansen didn't believe 336 00:24:55,850 --> 00:24:59,090 Speaker 1: that experiments on guinea pigs could tell him anything. He 337 00:24:59,210 --> 00:25:02,490 Speaker 1: hadn't learned the hard way out on the ice. He 338 00:25:02,570 --> 00:25:07,570 Speaker 1: wasn't the only skeptic. Holston Furlick's discoveries didn't persuade anyone 339 00:25:08,250 --> 00:25:13,810 Speaker 1: until it was too l eight, So Scott and Amunson 340 00:25:14,130 --> 00:25:19,130 Speaker 1: both reached the South Pole without understanding scurvy, but like 341 00:25:19,290 --> 00:25:23,930 Speaker 1: the steamships of the nineteenth century, Amuson simply outran scurvy. 342 00:25:24,370 --> 00:25:27,130 Speaker 1: His entire journey took three months, and for some of 343 00:25:27,170 --> 00:25:30,530 Speaker 1: that time he had plenty of access to fresh seal meat, 344 00:25:30,850 --> 00:25:35,410 Speaker 1: which contains vitamin C. Scott's group was away from their 345 00:25:35,450 --> 00:25:39,810 Speaker 1: base for nearly five months, and after exhausting journeys over 346 00:25:39,850 --> 00:25:42,890 Speaker 1: the previous winter, some of them may have been malnourished 347 00:25:42,890 --> 00:25:45,610 Speaker 1: before they even set out for the South Pole. It 348 00:25:45,650 --> 00:25:48,250 Speaker 1: was a race against time to get back to base 349 00:25:48,530 --> 00:25:54,690 Speaker 1: before their bodies failed them. By mid February, Amonson was 350 00:25:54,770 --> 00:25:58,610 Speaker 1: sailing from Antarctica to Australia to announce his achievement to 351 00:25:58,650 --> 00:26:02,850 Speaker 1: the world. Scott's crew were only halfway back from the 352 00:26:02,890 --> 00:26:06,890 Speaker 1: Pole to the base camp. Evans, who cut his knuckles 353 00:26:07,010 --> 00:26:09,570 Speaker 1: some days ago at the last depot, has a lot 354 00:26:09,570 --> 00:26:13,450 Speaker 1: of puss in it tonight, that's the group's doctor, Edward Wilson. 355 00:26:13,930 --> 00:26:17,650 Speaker 1: It's unlikely to be an infection. The Antarctic is one 356 00:26:17,650 --> 00:26:21,650 Speaker 1: of the most sterile environments on the planet, too cold 357 00:26:21,690 --> 00:26:26,930 Speaker 1: for bacteria. But the wound isn't healing. That's a classic 358 00:26:27,010 --> 00:26:31,890 Speaker 1: symptom of scurvy. Wilson again. Titus oates. His big toe 359 00:26:32,010 --> 00:26:36,450 Speaker 1: is turning blue black. Evans fingernails all coming off. Titus 360 00:26:36,490 --> 00:26:42,130 Speaker 1: nose and cheeks are dead yellow. Here's Scott. Evans has 361 00:26:42,250 --> 00:26:47,770 Speaker 1: dislodged two fingernails tonight. His hands are really bad, and 362 00:26:47,930 --> 00:26:51,970 Speaker 1: to my surprise, he shows signs of losing heart over it. 363 00:26:52,370 --> 00:26:55,770 Speaker 1: He hasn't been cheerful since the accident. He has very 364 00:26:55,810 --> 00:26:58,690 Speaker 1: little to be cheerful about. But then, one of the 365 00:26:58,730 --> 00:27:03,330 Speaker 1: symptoms of scurvy is a depressed mood. Everyone is worried 366 00:27:03,330 --> 00:27:06,530 Speaker 1: about Evans, but they're all eating the same food and 367 00:27:06,650 --> 00:27:11,250 Speaker 1: coping with the same brutal conditions. Whatever's happening to Evans 368 00:27:12,050 --> 00:27:16,410 Speaker 1: is coming for them too. Here's absolutely Cherry Garrard again, 369 00:27:16,730 --> 00:27:19,650 Speaker 1: trying to figure it all out. A decade later, there 370 00:27:19,730 --> 00:27:22,570 Speaker 1: was something wrong with this party, more wrong, I mean 371 00:27:22,610 --> 00:27:26,170 Speaker 1: than was justified by the tremendous journey they had already experienced, 372 00:27:26,450 --> 00:27:30,090 Speaker 1: which had been little worse than they expected. Evans, however, 373 00:27:30,490 --> 00:27:32,770 Speaker 1: who was considered by Scott to be the strongest man 374 00:27:32,810 --> 00:27:36,450 Speaker 1: of the party, had already collapsed, and it is admitted 375 00:27:36,490 --> 00:27:39,170 Speaker 1: that the rest of the party was becoming far from strong. 376 00:27:40,130 --> 00:27:44,010 Speaker 1: There seems to be an unknown factor here, somewhere, there 377 00:27:44,130 --> 00:27:48,850 Speaker 1: does doesn't there. We'll never know quite how significant scurvy 378 00:27:49,130 --> 00:27:52,690 Speaker 1: was among all the afflictions they faced. All we can 379 00:27:52,730 --> 00:27:56,290 Speaker 1: do is to look at scurvy's appearance in Polar expedition 380 00:27:56,490 --> 00:28:00,250 Speaker 1: after Polar expedition, then to look at the symptoms Scott's 381 00:28:00,290 --> 00:28:05,410 Speaker 1: men were suffering, and then draw our own conclusions. Here's 382 00:28:05,450 --> 00:28:09,970 Speaker 1: doctor Wilson. On the sixteenth of February, Evans lapsed, sick 383 00:28:10,050 --> 00:28:13,330 Speaker 1: and giddy and unable to walk even by the sledge 384 00:28:13,370 --> 00:28:17,410 Speaker 1: on ski, so we camped. Wilson must have known that 385 00:28:17,450 --> 00:28:21,010 Speaker 1: if Evans really was suffering from scurvy, the rest of 386 00:28:21,050 --> 00:28:25,050 Speaker 1: them were next next day, we had gone a good 387 00:28:25,090 --> 00:28:27,930 Speaker 1: part of the way when Evans found his ski shoes 388 00:28:27,970 --> 00:28:31,250 Speaker 1: coming off. He was allowed to readjust but it happened 389 00:28:31,250 --> 00:28:34,650 Speaker 1: again and then again, so he was told to unhitch, 390 00:28:34,930 --> 00:28:37,290 Speaker 1: get them right, and follow on and catch us up. 391 00:28:38,530 --> 00:28:43,690 Speaker 1: Captain Scott presumably gave that order, and so the four 392 00:28:44,010 --> 00:28:48,170 Speaker 1: skied away from Evans, leaving him in the most desolate 393 00:28:48,210 --> 00:28:51,850 Speaker 1: place on earth, leaving him to crawl forward alone on 394 00:28:51,930 --> 00:28:55,770 Speaker 1: his hands and knees. They must have been so desperate. 395 00:28:58,050 --> 00:29:00,650 Speaker 1: When we camped, we had lunch and then went back 396 00:29:00,690 --> 00:29:02,890 Speaker 1: for him, as he had not come up. He had 397 00:29:02,930 --> 00:29:07,130 Speaker 1: fallen and had his hands frostbitten. He was comatos when 398 00:29:07,170 --> 00:29:10,770 Speaker 1: we got him into the tent. He died without recovering 399 00:29:10,810 --> 00:29:17,450 Speaker 1: consciousness that night, about ten pm. They staggered on slowly 400 00:29:17,730 --> 00:29:21,730 Speaker 1: and unevenly as the winter overtook them. The temperatures were 401 00:29:21,730 --> 00:29:26,010 Speaker 1: falling and their strength was failing. The storage depots they'd 402 00:29:26,050 --> 00:29:28,730 Speaker 1: laid for their journey home didn't have enough food or 403 00:29:28,810 --> 00:29:31,850 Speaker 1: fuel to sustain them at the slow pace they were making. 404 00:29:32,930 --> 00:29:35,810 Speaker 1: Oates had an old war wound where a bullet had 405 00:29:35,850 --> 00:29:39,970 Speaker 1: shattered his thigh bone. If Oates's scar was dissolving as 406 00:29:40,010 --> 00:29:43,330 Speaker 1: he marched on that leg for day after day, it 407 00:29:43,450 --> 00:29:49,050 Speaker 1: must have been agony. On March the sixteenth, Captain Oates 408 00:29:49,090 --> 00:29:52,490 Speaker 1: fumbled to undo the lacing at the tent entrance and 409 00:29:52,690 --> 00:29:59,450 Speaker 1: limped out into a blizzard. He never returned. Scott's diary 410 00:29:59,530 --> 00:30:04,890 Speaker 1: recorded his last words as I'm just going outside, and 411 00:30:05,010 --> 00:30:10,650 Speaker 1: maybe sometime they all knew that he wasn't coming, and 412 00:30:10,890 --> 00:30:17,650 Speaker 1: despair soon came to claim them all. A few days later, Scott, Wilson, 413 00:30:17,970 --> 00:30:22,290 Speaker 1: and Bowers gave up. He lay down in an attempt 414 00:30:22,450 --> 00:30:25,810 Speaker 1: just eleven miles away from the next depot of food, 415 00:30:26,530 --> 00:30:29,130 Speaker 1: the weather had closed in again. They didn't have the 416 00:30:29,170 --> 00:30:34,490 Speaker 1: strength to continue. After months without vitamin C, John Crandon 417 00:30:34,650 --> 00:30:38,490 Speaker 1: couldn't jog for more than fifty yards. For Scott and 418 00:30:38,570 --> 00:30:43,130 Speaker 1: his last two companions, eleven miles in a blizzard must 419 00:30:43,170 --> 00:30:46,930 Speaker 1: have seemed an impossible distance. We shall stick it out 420 00:30:46,970 --> 00:30:49,810 Speaker 1: to the end, but we are getting weaker, of course, 421 00:30:50,690 --> 00:30:54,770 Speaker 1: and the end cannot be far. It seems a pity, 422 00:30:55,170 --> 00:30:59,010 Speaker 1: but I do not think I can write more. Their 423 00:30:59,050 --> 00:31:02,330 Speaker 1: bodies were found months later by a team that set 424 00:31:02,370 --> 00:31:05,770 Speaker 1: out from the British base camp. Bowers and Wilson were 425 00:31:05,770 --> 00:31:09,610 Speaker 1: sleeping in their bags. Scott had thrown back the flaps 426 00:31:09,650 --> 00:31:12,610 Speaker 1: of his bag at the end. His left hand was 427 00:31:12,610 --> 00:31:18,690 Speaker 1: stretched over Wilson, his lifelong friend. There were diaries there 428 00:31:19,570 --> 00:31:23,970 Speaker 1: and farewell letters. When the group tried to move Scott's 429 00:31:24,010 --> 00:31:35,130 Speaker 1: frozen arm to recover the documents, it broke. We like 430 00:31:35,290 --> 00:31:39,490 Speaker 1: to think that knowledge, once gained, is gained forever. But 431 00:31:39,610 --> 00:31:44,530 Speaker 1: unless we know why something works, we risk confusing ourselves 432 00:31:44,570 --> 00:31:51,250 Speaker 1: back into ignorance. Scott's demise would have astonished the British 433 00:31:51,370 --> 00:31:54,970 Speaker 1: navy of a hundred years before him. They'd have known 434 00:31:55,050 --> 00:31:58,450 Speaker 1: that it might all have been different with the juice 435 00:31:58,570 --> 00:32:16,930 Speaker 1: of a few Sicilian lemons. For a list of all 436 00:32:16,970 --> 00:32:28,010 Speaker 1: our sources, see the show notes at Tim Harford dot com. 437 00:32:28,050 --> 00:32:32,130 Speaker 1: Cautionary Tales is written by me Tim Harford with Andrew Wright. 438 00:32:32,730 --> 00:32:36,250 Speaker 1: It's produced by Ryan Dilley, with support from Courtney Guarino 439 00:32:36,450 --> 00:32:39,970 Speaker 1: and Emily Vaughan. The sound design and original music is 440 00:32:40,010 --> 00:32:43,610 Speaker 1: the work of Pascal Wise. 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