1 00:00:03,840 --> 00:00:06,720 Speaker 1: Welcome to Stuff to Blow your Mind from how Stuff 2 00:00:06,720 --> 00:00:13,880 Speaker 1: Works dot com. Hey you welcome to Stuff to Blow 3 00:00:13,920 --> 00:00:17,200 Speaker 1: your Mind. My name is Robert Lamb and I'm Julie Douglas. Julie. 4 00:00:17,320 --> 00:00:20,000 Speaker 1: I just recently returned from a trip out west, out 5 00:00:20,000 --> 00:00:23,960 Speaker 1: into the deserts of Arizona. And while I was there, 6 00:00:24,040 --> 00:00:26,840 Speaker 1: my wife and I visited the Desert Museum, which I 7 00:00:26,920 --> 00:00:30,240 Speaker 1: highly recommend anyone visiting Arizona there they go check that 8 00:00:30,280 --> 00:00:32,720 Speaker 1: out because it's it's not really a museum, it's more 9 00:00:32,760 --> 00:00:34,920 Speaker 1: of a botanical garden with some animals living in it, 10 00:00:35,320 --> 00:00:39,760 Speaker 1: and uh, it really opens your eyes to how diverse 11 00:00:40,040 --> 00:00:43,320 Speaker 1: a desert ecosystem actually is, how much life is there, 12 00:00:43,360 --> 00:00:45,480 Speaker 1: even if it is life that is thriving on a 13 00:00:45,560 --> 00:00:49,159 Speaker 1: on a smaller level. You know, so many amazing varieties 14 00:00:49,200 --> 00:00:52,400 Speaker 1: of CACTI got to see alive have Alina for the 15 00:00:52,440 --> 00:00:54,400 Speaker 1: first time, which was which was on my list of 16 00:00:54,400 --> 00:00:56,840 Speaker 1: things to do. But then I also learned for the 17 00:00:56,880 --> 00:01:00,240 Speaker 1: first time that a pack rat is an act will 18 00:01:00,320 --> 00:01:03,240 Speaker 1: than well. I I just kind of assume prior to 19 00:01:03,280 --> 00:01:05,240 Speaker 1: this that when people said, oh, he's a pack right, 20 00:01:05,280 --> 00:01:07,399 Speaker 1: he's a pack rat, that maybe we were referring to 21 00:01:07,520 --> 00:01:11,720 Speaker 1: some vague, um myth or legend that rats like to 22 00:01:11,760 --> 00:01:14,360 Speaker 1: collect items and store them somewhere. I had no idea. 23 00:01:15,160 --> 00:01:18,880 Speaker 1: I have to admit that it was an actual creature. Yeah, yeah, actually, um, 24 00:01:18,920 --> 00:01:20,679 Speaker 1: I'm sure that a lot of our listeners know this. 25 00:01:21,000 --> 00:01:25,880 Speaker 1: Listeners in the Southwest, right, because apparently pack rats um 26 00:01:26,440 --> 00:01:29,760 Speaker 1: are a bit of a pestilence, a bit of a 27 00:01:29,760 --> 00:01:34,400 Speaker 1: problem and um or something that people try to get 28 00:01:34,520 --> 00:01:37,240 Speaker 1: rid of because they like to take up residents in 29 00:01:37,440 --> 00:01:41,120 Speaker 1: cars sometimes and and choot through the wiring or just 30 00:01:41,160 --> 00:01:43,840 Speaker 1: get into the house. Yeah, they like to set up 31 00:01:44,200 --> 00:01:47,240 Speaker 1: camp and as well discussing this this episode, they do 32 00:01:47,400 --> 00:01:49,760 Speaker 1: collect objects. They like to use them to decorate their 33 00:01:49,800 --> 00:01:53,120 Speaker 1: little homes and sometimes the often the objects they collect 34 00:01:53,560 --> 00:01:55,840 Speaker 1: in an urban environment are not things you want them 35 00:01:55,920 --> 00:01:59,360 Speaker 1: running off with, like parts to your vehicle, important parts 36 00:01:59,480 --> 00:02:03,440 Speaker 1: or car keys or teeth. These kind of things can 37 00:02:03,600 --> 00:02:05,800 Speaker 1: convantage We have pack rats in the area. They can 38 00:02:05,800 --> 00:02:09,320 Speaker 1: be very destructive, but they are a very fascinating species, 39 00:02:09,680 --> 00:02:13,919 Speaker 1: like deceptively fascinating and deceptively useful. So we decided we 40 00:02:13,919 --> 00:02:16,639 Speaker 1: would we take the time to to consider the pack 41 00:02:16,760 --> 00:02:19,160 Speaker 1: rat and to examine some of the things that make 42 00:02:19,200 --> 00:02:21,919 Speaker 1: this an interesting species, which you know, the next time 43 00:02:21,960 --> 00:02:25,320 Speaker 1: you look out at a desert vista, you should consider 44 00:02:25,400 --> 00:02:28,480 Speaker 1: these guys and how elaborate they make their homes. But 45 00:02:28,560 --> 00:02:31,560 Speaker 1: before we talk about this, let's talk about where they 46 00:02:31,600 --> 00:02:36,440 Speaker 1: actually roam in a bit about what they look like. Yeah, 47 00:02:36,560 --> 00:02:40,320 Speaker 1: there are presently twenty one living species of pack rat 48 00:02:40,960 --> 00:02:46,079 Speaker 1: um or neatoma, occurring a wide rangement of habitats. You'll 49 00:02:46,120 --> 00:02:48,360 Speaker 1: find them around the edge of the Arctic Circle, all 50 00:02:48,400 --> 00:02:51,800 Speaker 1: the way the tropics of Nicaragua, throughout western Canada, most 51 00:02:51,840 --> 00:02:54,880 Speaker 1: of the US Mexico, Central America, also known as trade 52 00:02:54,960 --> 00:02:58,440 Speaker 1: rats or wood rats. Wherever they roam, though, they have 53 00:02:58,560 --> 00:03:02,440 Speaker 1: two key requirements, right they need succulent plants for food 54 00:03:02,600 --> 00:03:05,239 Speaker 1: and adequate shelter. And when I mean succulents, that of 55 00:03:05,320 --> 00:03:09,480 Speaker 1: course mean cacti and tiny cacti and desert not delicious 56 00:03:09,520 --> 00:03:14,120 Speaker 1: succulent not not just delicious foods. That they are cactus laughters. 57 00:03:14,240 --> 00:03:17,240 Speaker 1: They depend on the cactus. That's where they get most, 58 00:03:17,280 --> 00:03:19,600 Speaker 1: if not all, of their water. Like these guys are 59 00:03:20,200 --> 00:03:22,400 Speaker 1: in their natural environment, They're not going to go search 60 00:03:22,440 --> 00:03:24,280 Speaker 1: for a stream to lap up water. They're getting it 61 00:03:24,440 --> 00:03:27,960 Speaker 1: exclusively from the cacti that they're chewing on. And I 62 00:03:28,040 --> 00:03:30,440 Speaker 1: dare say that these guys are actually pretty cute and 63 00:03:30,480 --> 00:03:33,200 Speaker 1: cuddly looking. Yeah, they look like little mice, like they're not. 64 00:03:34,520 --> 00:03:36,720 Speaker 1: I mean, I don't know what one expect they. I 65 00:03:36,720 --> 00:03:39,760 Speaker 1: guess you'd expected to have little pockets and and like 66 00:03:39,880 --> 00:03:41,800 Speaker 1: chains and jewelry and kind of look like Hoggle and 67 00:03:41,920 --> 00:03:45,000 Speaker 1: Labyrinth or something. But I have like a little grocery cart. Yeah, yeah, 68 00:03:45,000 --> 00:03:48,400 Speaker 1: a little grocery cart full of junk pushing along. But no, 69 00:03:48,920 --> 00:03:51,240 Speaker 1: they kind of to the untrained eye, they look just 70 00:03:51,320 --> 00:03:53,600 Speaker 1: like a mouse of some sort. Yeah. They have grayish 71 00:03:53,640 --> 00:03:57,760 Speaker 1: brown fur with tawny undertones, white feet and undersides. They 72 00:03:57,760 --> 00:04:00,200 Speaker 1: can be distinguished from their distant relative in no way 73 00:04:00,280 --> 00:04:03,320 Speaker 1: rat by their blunt noses and long whiskers, and they 74 00:04:03,400 --> 00:04:06,480 Speaker 1: usually measure anywhere from about eight inches long to fifteen 75 00:04:06,520 --> 00:04:09,760 Speaker 1: inches long, depending on the species or the subspecies. Um. 76 00:04:09,920 --> 00:04:13,040 Speaker 1: The tail is another five to seven inches, and wood 77 00:04:13,160 --> 00:04:17,280 Speaker 1: rats tails are more furred than scaly, and they have 78 00:04:17,360 --> 00:04:20,679 Speaker 1: so they don't have that that that possum rat tail 79 00:04:20,800 --> 00:04:23,840 Speaker 1: where it's just like a naked, squirmy worm type thing. 80 00:04:23,960 --> 00:04:25,279 Speaker 1: The most of the time you see that and you 81 00:04:25,320 --> 00:04:27,039 Speaker 1: kind of recoil from it, but this is more of 82 00:04:27,040 --> 00:04:32,080 Speaker 1: a furry tail and they have extraordinary large round ears. Again, 83 00:04:32,400 --> 00:04:35,600 Speaker 1: this is what makes them, I guess, uh, we can 84 00:04:35,600 --> 00:04:37,960 Speaker 1: put them in the cute category because of this. The 85 00:04:37,960 --> 00:04:40,640 Speaker 1: tail is covered by loose skin which can be shed 86 00:04:40,760 --> 00:04:43,920 Speaker 1: to escape or predator. That's that was really fascinating because 87 00:04:43,920 --> 00:04:46,200 Speaker 1: it's it's kind of like a lizard, right, except it's 88 00:04:46,240 --> 00:04:49,080 Speaker 1: not shedding the entire tail. It's just shedding the skin 89 00:04:49,160 --> 00:04:53,200 Speaker 1: off of it, which sounds horrifying as well, but certainly 90 00:04:53,200 --> 00:04:56,200 Speaker 1: of an owl is coming after you better that he 91 00:04:56,200 --> 00:04:58,720 Speaker 1: takes the skin off your tail than all of you. Yeah, 92 00:04:58,720 --> 00:05:00,640 Speaker 1: it's a nat trick, right, and the and the owl 93 00:05:00,680 --> 00:05:03,400 Speaker 1: get something out of it as well, right, Thanks for 94 00:05:03,440 --> 00:05:07,320 Speaker 1: the memories. Um so. Yeah. And they are usually solitary, 95 00:05:07,640 --> 00:05:10,880 Speaker 1: although a bit we'll talk a little bit about more 96 00:05:10,920 --> 00:05:14,480 Speaker 1: how they deviate from solitary confinement of their of themselves. 97 00:05:14,560 --> 00:05:16,600 Speaker 1: What is interesting to the solitary because the idea of 98 00:05:16,640 --> 00:05:18,880 Speaker 1: a pack rat is is we throw the term around 99 00:05:18,880 --> 00:05:21,559 Speaker 1: in human environments is you often think of a person 100 00:05:21,600 --> 00:05:25,520 Speaker 1: who lives alone and collects lots and lots of things. 101 00:05:25,600 --> 00:05:29,400 Speaker 1: You're thinking hoarding territory, hoarding territory, which is a whole 102 00:05:29,440 --> 00:05:33,800 Speaker 1: another podcast which we'll get to, but but much darker 103 00:05:33,839 --> 00:05:37,000 Speaker 1: podcast than than what we're talking about here. Yeah, because 104 00:05:37,040 --> 00:05:40,479 Speaker 1: these pack rats, um, they're not just trying to accumulate 105 00:05:40,520 --> 00:05:44,000 Speaker 1: for accumulation's sake. There seems to be a couple of 106 00:05:44,000 --> 00:05:46,360 Speaker 1: different things going on for the for the reasons why 107 00:05:46,400 --> 00:05:49,960 Speaker 1: they are accumulating debris. But let's first talk about these 108 00:05:50,000 --> 00:05:54,880 Speaker 1: guys as architects. So the big thing about the pack 109 00:05:55,000 --> 00:05:57,919 Speaker 1: rat and the thing that fascinates us and and and 110 00:05:58,000 --> 00:06:00,560 Speaker 1: ultimately the reason we're talking about them now is that 111 00:06:00,600 --> 00:06:04,160 Speaker 1: they build little dens, little homes, And if you look 112 00:06:04,200 --> 00:06:06,320 Speaker 1: at one of these houses, it kind of looks like 113 00:06:06,360 --> 00:06:09,200 Speaker 1: a little dollhouse made out of sticks and garbage and 114 00:06:09,240 --> 00:06:12,920 Speaker 1: just desert materials just cobbled together into this little home. 115 00:06:13,000 --> 00:06:15,760 Speaker 1: It's it's it's really fascinating. And it's not just one 116 00:06:15,800 --> 00:06:17,400 Speaker 1: of these things where we look at it and we're like, oh, 117 00:06:17,440 --> 00:06:19,200 Speaker 1: it looks like a little home with little rooms for 118 00:06:19,320 --> 00:06:23,480 Speaker 1: different uses. They actually use the different rooms for different things. 119 00:06:24,080 --> 00:06:26,680 Speaker 1: It's very intentional. Beginning with what you could call the 120 00:06:26,760 --> 00:06:30,680 Speaker 1: front door. Uh, usually they will use stands of troll 121 00:06:31,000 --> 00:06:33,719 Speaker 1: or prickly pear cacti Yeah, the whole thing is is 122 00:06:33,760 --> 00:06:38,360 Speaker 1: surrounded with prickly cactus bits that serve as a barrier. 123 00:06:38,760 --> 00:06:41,640 Speaker 1: And this is really interesting because, um, you have Native 124 00:06:41,640 --> 00:06:44,200 Speaker 1: American tribes in the area that would depend on these 125 00:06:44,240 --> 00:06:47,000 Speaker 1: living fences where they would take bits of cactus and 126 00:06:47,040 --> 00:06:50,320 Speaker 1: sort of strap them together and make little fences out 127 00:06:50,360 --> 00:06:53,719 Speaker 1: of the cacti. And the pack rat does the same 128 00:06:53,720 --> 00:06:56,599 Speaker 1: thing and was doing the same thing long before humans 129 00:06:56,640 --> 00:06:58,760 Speaker 1: occupied the area, right, So if a predator were to 130 00:06:58,760 --> 00:07:01,120 Speaker 1: come to their nest, then it would be met by this, 131 00:07:01,560 --> 00:07:04,240 Speaker 1: you know, cacti, which would not feel so great. And 132 00:07:04,240 --> 00:07:06,480 Speaker 1: the pack rats actually cut them into three to four 133 00:07:06,600 --> 00:07:09,000 Speaker 1: inch long pieces and carry them to their nest sites 134 00:07:09,080 --> 00:07:11,600 Speaker 1: in their mouth. So if you see a stand of 135 00:07:11,800 --> 00:07:13,960 Speaker 1: saprickly pair and you see little score marks on it, 136 00:07:14,040 --> 00:07:16,760 Speaker 1: you can tell that a pack rat has been there. Um. 137 00:07:16,800 --> 00:07:19,560 Speaker 1: So the cacti does serve both as a nest protector 138 00:07:19,840 --> 00:07:23,520 Speaker 1: and as food and also provides some really good installation. 139 00:07:23,720 --> 00:07:27,760 Speaker 1: The temperature inside of that that pack rat den is 140 00:07:27,880 --> 00:07:32,160 Speaker 1: really stable and and it all comes from the installation. Okay, 141 00:07:32,200 --> 00:07:34,680 Speaker 1: So the nest actually consists of two parts. There's the house, 142 00:07:34,720 --> 00:07:37,400 Speaker 1: which is the collective material, which is mostly above ground, 143 00:07:37,800 --> 00:07:40,720 Speaker 1: and then the nest itself, which is usually dug part 144 00:07:40,760 --> 00:07:43,040 Speaker 1: way below grounds. So that's where we start to see 145 00:07:43,080 --> 00:07:46,000 Speaker 1: these different chambers and these specialized areas for the pack 146 00:07:46,120 --> 00:07:49,400 Speaker 1: rat to live in. Right, they'll have several rooms that 147 00:07:49,480 --> 00:07:53,880 Speaker 1: are devoted to food storing food because ultimately, if you're 148 00:07:53,920 --> 00:07:56,640 Speaker 1: a rodent and you're living it rough out there in 149 00:07:56,640 --> 00:07:58,559 Speaker 1: the world, you're gonna want to store away some food, 150 00:07:58,640 --> 00:08:01,200 Speaker 1: right to survive the lean tie. And they'll have as 151 00:08:01,320 --> 00:08:04,720 Speaker 1: much as three bushels of plant material stored away in there. 152 00:08:05,800 --> 00:08:10,080 Speaker 1: And then they have another area that is actually thought 153 00:08:10,120 --> 00:08:13,360 Speaker 1: of as um We call it sometimes a daytime retreat, 154 00:08:14,000 --> 00:08:17,400 Speaker 1: like a day room, which is very helpful during the 155 00:08:17,440 --> 00:08:21,840 Speaker 1: more intensely heated summer months, right, But it's also used 156 00:08:21,840 --> 00:08:25,080 Speaker 1: as a nursery sometimes, so it's like a bedroom slash 157 00:08:25,320 --> 00:08:30,120 Speaker 1: nursery slash rump. This room, I guess, yeah, sort of 158 00:08:30,160 --> 00:08:33,240 Speaker 1: like your guest room in your house perhaps is a 159 00:08:33,320 --> 00:08:37,840 Speaker 1: multipurpose room. And then this is really interesting too. They 160 00:08:37,880 --> 00:08:42,480 Speaker 1: have a latrine. And and now that sounds kind of 161 00:08:43,160 --> 00:08:45,319 Speaker 1: like if you're like, oh man, why would you have 162 00:08:45,640 --> 00:08:48,360 Speaker 1: you know, the latrine as part of your nest. But 163 00:08:48,840 --> 00:08:51,720 Speaker 1: well that humans have a ladder into talk. Since we 164 00:08:52,960 --> 00:08:55,760 Speaker 1: started doing indoor plumbing and moved our bathrooms inside, everyone 165 00:08:55,800 --> 00:08:59,360 Speaker 1: has a room that is devoted almost entirely to pooping. 166 00:08:59,760 --> 00:09:02,080 Speaker 1: So you may you may not think of it that way, 167 00:09:02,080 --> 00:09:03,640 Speaker 1: but that's what you have. What do you think it 168 00:09:03,679 --> 00:09:06,720 Speaker 1: would do to us psychologically if we just renamed restroom 169 00:09:06,760 --> 00:09:10,800 Speaker 1: poop room everywhere wholesale? Yeah, like no matter where you went, 170 00:09:10,880 --> 00:09:13,520 Speaker 1: and you just say I've got good of the pooper room, Yeah, 171 00:09:13,559 --> 00:09:15,160 Speaker 1: it would. I mean the thing that gets me, it's 172 00:09:15,160 --> 00:09:18,200 Speaker 1: one thing to call the bathroom. Okay, so bathroom all right, 173 00:09:18,240 --> 00:09:20,440 Speaker 1: called a bathroom because it has a bathroom there. All right, 174 00:09:20,600 --> 00:09:23,280 Speaker 1: fair enough, You're gonna put the spotlight on the thing 175 00:09:23,360 --> 00:09:26,160 Speaker 1: that's most relaxing and has less to do with our 176 00:09:26,200 --> 00:09:30,040 Speaker 1: bodily functions, the restroom. Okay, Well you're going in there, 177 00:09:30,080 --> 00:09:32,800 Speaker 1: you're well, you may be doing something RESTful, but it 178 00:09:32,880 --> 00:09:35,840 Speaker 1: also there also might be a very stressful incidents going 179 00:09:35,880 --> 00:09:38,360 Speaker 1: on inside that room. But what gets me is the 180 00:09:38,400 --> 00:09:41,040 Speaker 1: water closet where it's where this is when you have 181 00:09:41,679 --> 00:09:43,920 Speaker 1: have a room that only has a toilet in it, 182 00:09:44,360 --> 00:09:46,800 Speaker 1: Like if anything is a pooper room, that's a pooper room. 183 00:09:46,800 --> 00:09:49,360 Speaker 1: But we call it the water close. It's it's a 184 00:09:49,400 --> 00:09:52,119 Speaker 1: magical little room that has a fountain and a waterfall 185 00:09:52,160 --> 00:09:53,640 Speaker 1: in it. It does some kind of love the I'm 186 00:09:53,679 --> 00:09:56,360 Speaker 1: going to the multa closet, you see, but that is 187 00:09:56,440 --> 00:09:59,240 Speaker 1: essentially what the pack rad has, a water closet because 188 00:09:59,559 --> 00:10:02,400 Speaker 1: again the pack rick doesn't want to go outside during 189 00:10:02,679 --> 00:10:05,560 Speaker 1: this horrible heat and uh and use the restroom elsewhere. 190 00:10:05,600 --> 00:10:09,480 Speaker 1: She needs an indoor potty and that's what this room is. Well, 191 00:10:09,480 --> 00:10:11,400 Speaker 1: if she went outside too, she would be subject to 192 00:10:11,400 --> 00:10:15,119 Speaker 1: the predation from like we said, owls, snakes, and coyotes. 193 00:10:15,600 --> 00:10:18,760 Speaker 1: So this is another reason to have an indoor latrine um. 194 00:10:18,800 --> 00:10:21,640 Speaker 1: And actually too, when they bring in some of their collectibles, 195 00:10:21,640 --> 00:10:24,160 Speaker 1: they do bring it into the lutrine and the urinate 196 00:10:24,240 --> 00:10:28,840 Speaker 1: on that, which creates a bit of a specimen that 197 00:10:29,000 --> 00:10:31,600 Speaker 1: we'll talk about later on. That's very helpful to our 198 00:10:31,720 --> 00:10:34,160 Speaker 1: understanding of the environment. I've I've heard it put that 199 00:10:34,200 --> 00:10:38,480 Speaker 1: they'll bring in things to quote unquote decorate their house, 200 00:10:38,600 --> 00:10:40,920 Speaker 1: and then as they tire of these decorations as they 201 00:10:40,920 --> 00:10:43,440 Speaker 1: become old, or as we'll discuss a minute, when some 202 00:10:43,480 --> 00:10:45,160 Speaker 1: of the elements that they used to decorate when they 203 00:10:45,200 --> 00:10:49,360 Speaker 1: lose their functionality. They dumped them into the latrine room, 204 00:10:49,400 --> 00:10:51,920 Speaker 1: so not everything goes directly to the traine room. Sometimes 205 00:10:51,920 --> 00:10:54,360 Speaker 1: it's like I'm kind of sick of that painting. I'm 206 00:10:54,400 --> 00:10:57,400 Speaker 1: gonna put it in the poop chamber. Well, and see again, 207 00:10:57,440 --> 00:10:59,880 Speaker 1: this is very intentional, right, It's interesting that they would 208 00:11:00,120 --> 00:11:04,560 Speaker 1: be decorating in quotes right their dens and having a 209 00:11:04,640 --> 00:11:08,720 Speaker 1: sort of revolving artwork or installation that eventually gets put 210 00:11:08,760 --> 00:11:11,040 Speaker 1: into what we call the midden. This is the area 211 00:11:11,200 --> 00:11:14,000 Speaker 1: that they urinate on. And we'll talk more about the 212 00:11:14,000 --> 00:11:17,560 Speaker 1: midden in a moment, but they also have been known 213 00:11:17,640 --> 00:11:21,800 Speaker 1: to line their homes with leaves, yes, particularly bay leaves, 214 00:11:22,160 --> 00:11:23,960 Speaker 1: you know, the type of leaf that you put in 215 00:11:23,960 --> 00:11:26,760 Speaker 1: your spaghetti. Very aromatic, and you would think of this 216 00:11:26,800 --> 00:11:31,120 Speaker 1: as a kind of wood rat potpourri or pack rat potpourri. 217 00:11:31,440 --> 00:11:33,920 Speaker 1: You might think that at first, but it actually serves 218 00:11:33,720 --> 00:11:36,720 Speaker 1: a far more important purpose, and that is to keep 219 00:11:36,760 --> 00:11:40,160 Speaker 1: the pest down. It's basically they're fumigating the den, right, 220 00:11:40,280 --> 00:11:43,720 Speaker 1: so they don't want ectoparasites hanging around, particularly where they sleep, 221 00:11:43,800 --> 00:11:46,560 Speaker 1: so they line this area with those bay leaves, and 222 00:11:46,600 --> 00:11:49,320 Speaker 1: that really acts as a repellent, which I thought was 223 00:11:49,360 --> 00:11:52,280 Speaker 1: completely fascinating. So not only do you have artwork that 224 00:11:52,559 --> 00:11:57,000 Speaker 1: is revolving, artwork that you know, disappears and goes into 225 00:11:57,040 --> 00:11:58,760 Speaker 1: littering when they get tired of it, but you've got 226 00:11:58,760 --> 00:12:03,240 Speaker 1: these nice fragrant bay leaves scenting the den. Yeah. I 227 00:12:03,240 --> 00:12:07,600 Speaker 1: also found it interesting that sometimes they have roommates, like 228 00:12:07,679 --> 00:12:12,400 Speaker 1: non rodent roommates such as box turtles, skinks, lizards, well know, 229 00:12:12,559 --> 00:12:16,000 Speaker 1: sometimes other rodents, but which you also see with the 230 00:12:16,160 --> 00:12:19,800 Speaker 1: with beavers as that recall, um, the other animal that 231 00:12:19,880 --> 00:12:23,439 Speaker 1: is generally the beloved animal that that builds houses out 232 00:12:23,440 --> 00:12:26,400 Speaker 1: of craft that it finds. Yeah, well, because the beaver 233 00:12:26,559 --> 00:12:29,160 Speaker 1: is like, oh, then the beaver is we look at 234 00:12:29,160 --> 00:12:32,200 Speaker 1: the beaver, is this uh, this industrious creature that's doing 235 00:12:32,200 --> 00:12:34,200 Speaker 1: good in the world. But the pack rat is a 236 00:12:34,240 --> 00:12:36,400 Speaker 1: past The pack rat is a destroyer, right, but they're 237 00:12:36,400 --> 00:12:38,240 Speaker 1: basically doing their own thing that it's just to what 238 00:12:38,320 --> 00:12:41,520 Speaker 1: extent they interfere with human plans. Well that's because beavers 239 00:12:41,559 --> 00:12:44,440 Speaker 1: don't try to how wire your car. Yeah well yeah 240 00:12:44,640 --> 00:12:48,400 Speaker 1: yet yet. Um so I found it interesting that the 241 00:12:48,400 --> 00:12:51,480 Speaker 1: pack rats may have some other creatures living around, Like 242 00:12:52,120 --> 00:12:54,160 Speaker 1: I mean, a pack rat that lives with the box turtle. 243 00:12:54,760 --> 00:12:57,120 Speaker 1: That that's the reality show right there. That are a 244 00:12:57,200 --> 00:13:00,400 Speaker 1: sitcom set up that I would watch. Yeah, um, and 245 00:13:00,440 --> 00:13:03,480 Speaker 1: we have you know, said that they're primarily solitary, but 246 00:13:03,559 --> 00:13:05,600 Speaker 1: the fact of the matter is is that they are 247 00:13:05,880 --> 00:13:09,760 Speaker 1: largely natural inning all these societies, and they live in 248 00:13:09,800 --> 00:13:13,240 Speaker 1: a pretty loosely cooperative society. So when the pups are weaned, 249 00:13:13,320 --> 00:13:17,480 Speaker 1: this is really interesting. Males babies, by the way, one 250 00:13:17,520 --> 00:13:20,280 Speaker 1: to four babies, the males will actually leave the den 251 00:13:20,360 --> 00:13:23,480 Speaker 1: and they will go off into the hinter lands, but 252 00:13:23,600 --> 00:13:27,839 Speaker 1: the females will move to adjacent stick houses, remaining close 253 00:13:27,880 --> 00:13:30,920 Speaker 1: to their mother. And then when the matriarch dies, one 254 00:13:30,960 --> 00:13:34,920 Speaker 1: of her daughters actually will inherit the stick home and 255 00:13:35,240 --> 00:13:39,320 Speaker 1: a single wood rat can um maintain this home for 256 00:13:39,360 --> 00:13:43,160 Speaker 1: several generations, for the same family for decades and decades. 257 00:13:43,480 --> 00:13:45,720 Speaker 1: Oh wow, Now this this leads to an idea in 258 00:13:45,760 --> 00:13:49,640 Speaker 1: my mind, what if you had Downton Abbey all pack 259 00:13:49,720 --> 00:13:54,240 Speaker 1: rats already would be great? Like's Maggie h Maggie Smith? 260 00:13:54,640 --> 00:13:58,319 Speaker 1: Is that her name? The dowurs on there right right? Yeah? 261 00:13:58,440 --> 00:14:00,760 Speaker 1: As a pack rat, I think that would be great. Well, 262 00:14:00,840 --> 00:14:04,079 Speaker 1: they would have an awesome art collection already, you know, 263 00:14:04,200 --> 00:14:08,280 Speaker 1: that um again, another great idea for a show there. 264 00:14:09,440 --> 00:14:11,800 Speaker 1: But you know what, this is all sort of pointing 265 00:14:11,840 --> 00:14:15,720 Speaker 1: to this idea that pack rats aren't just collecting things. 266 00:14:15,760 --> 00:14:20,040 Speaker 1: They are actually giving us a clue of how um, 267 00:14:20,240 --> 00:14:23,680 Speaker 1: how the earth once was. And we can look at 268 00:14:23,720 --> 00:14:26,840 Speaker 1: them not just as architects, but as archaeologists. And we're 269 00:14:26,840 --> 00:14:28,520 Speaker 1: gonna take a quick break, but when we get back, 270 00:14:28,560 --> 00:14:34,240 Speaker 1: we're going to discuss this idea a bit more. All Right, 271 00:14:34,280 --> 00:14:39,320 Speaker 1: we're back, and we are already inside the pack rats again. 272 00:14:39,640 --> 00:14:43,600 Speaker 1: We've talked about their latrine room, the midden, where they 273 00:14:44,200 --> 00:14:49,920 Speaker 1: urinate coviously on old bits of art and uh and 274 00:14:49,600 --> 00:14:52,720 Speaker 1: uh and by which I mean bits of plant pollen, 275 00:14:52,800 --> 00:14:56,400 Speaker 1: animal bones in more recent years, lots of human artifacts, 276 00:14:56,440 --> 00:14:59,960 Speaker 1: pieces of cars. There's one story about the man's false 277 00:15:00,080 --> 00:15:02,560 Speaker 1: teeth going missing, and they showed up in one of 278 00:15:02,560 --> 00:15:05,200 Speaker 1: these dens, anything that catches their fancy, and they were 279 00:15:05,200 --> 00:15:07,640 Speaker 1: gathering the stuff from a wide territory. Yeah, but a 280 00:15:07,680 --> 00:15:10,520 Speaker 1: hundred mile radius is where they gather all of these 281 00:15:10,560 --> 00:15:14,320 Speaker 1: different materials. And so when a pack rat urinates on 282 00:15:14,400 --> 00:15:18,600 Speaker 1: its collections, the high calcium oxalate content of the urine 283 00:15:18,600 --> 00:15:22,120 Speaker 1: helps to solidify and preserve the items in a hard, 284 00:15:22,320 --> 00:15:26,680 Speaker 1: resinous or vitreous looking like material called midden. Yeah, their 285 00:15:26,760 --> 00:15:29,240 Speaker 1: urine is very viscous too, just to throw that im 286 00:15:29,240 --> 00:15:31,560 Speaker 1: engine in your mind. Yeah, and the midden kind of 287 00:15:31,560 --> 00:15:33,800 Speaker 1: looks like peanut brittle. It's been described as at or 288 00:15:33,920 --> 00:15:36,560 Speaker 1: chocolate bar filled with nuts. And there's even one account 289 00:15:36,720 --> 00:15:40,480 Speaker 1: of um people who were seeking out the gold rush 290 00:15:40,600 --> 00:15:44,080 Speaker 1: back in the eighteen hundreds, UM getting to a part 291 00:15:44,160 --> 00:15:47,400 Speaker 1: of the landscape that they were traveling through UM and 292 00:15:47,480 --> 00:15:50,440 Speaker 1: not having enough to eat and actually finding the midden 293 00:15:50,800 --> 00:15:54,440 Speaker 1: and using nuts as a Yeah, they said it looked like, well, 294 00:15:54,640 --> 00:15:56,680 Speaker 1: kind of like twistlers. I guess which I'm eating today 295 00:15:56,680 --> 00:15:59,760 Speaker 1: because it's Halloweens were recording it. Yes, I guess you 296 00:15:59,800 --> 00:16:03,480 Speaker 1: could say like a honey. Yeah, looking if I look 297 00:16:03,520 --> 00:16:06,880 Speaker 1: on the package, Um, well no, I guess there're no 298 00:16:07,040 --> 00:16:10,040 Speaker 1: ingredients on this. This is a fun size. But um, yeah, 299 00:16:10,040 --> 00:16:13,720 Speaker 1: it wouldn't be surprised if the midden midden materials like 300 00:16:13,840 --> 00:16:19,920 Speaker 1: ten percent. But but yeah, you've given a long enough 301 00:16:19,960 --> 00:16:22,560 Speaker 1: time though, this stuff will actually will crystallize into something. 302 00:16:22,640 --> 00:16:26,200 Speaker 1: It's almost like amber. And consider too that pack rats 303 00:16:26,880 --> 00:16:29,880 Speaker 1: have been doing this for at least forty tho years 304 00:16:29,960 --> 00:16:33,800 Speaker 1: we found midden material that's forty thou years old, So 305 00:16:34,800 --> 00:16:39,680 Speaker 1: inadvertently in their garbage, they have preserved some fascinating pidbits 306 00:16:39,720 --> 00:16:43,120 Speaker 1: about the history of the planet. Much like with archaeologist 307 00:16:43,120 --> 00:16:45,480 Speaker 1: when you look at human settlements, if you can find 308 00:16:45,520 --> 00:16:48,480 Speaker 1: where they're throwing away their garbage, gold mine, because that 309 00:16:48,720 --> 00:16:51,240 Speaker 1: gives you this insight into their daily life. What were 310 00:16:51,240 --> 00:16:53,320 Speaker 1: they eating, what were they using, what was their life 311 00:16:53,320 --> 00:16:57,520 Speaker 1: consisting of outside of uh, you know, religious iconography and 312 00:16:57,600 --> 00:16:59,760 Speaker 1: what have you. What was the what was their daily 313 00:16:59,800 --> 00:17:02,520 Speaker 1: life consisting of? With the with the pack rat, although 314 00:17:02,520 --> 00:17:06,080 Speaker 1: it's more of a more of an insight into past climates, 315 00:17:06,400 --> 00:17:10,520 Speaker 1: especially in dry western North America. Yeah, and actually, previous 316 00:17:10,560 --> 00:17:14,040 Speaker 1: to the nineteen sixties, when midden was discovered and it 317 00:17:14,119 --> 00:17:17,720 Speaker 1: was discovered that you could actually strike archaeological gold here 318 00:17:17,720 --> 00:17:20,520 Speaker 1: and use this to to look into the past, they 319 00:17:20,560 --> 00:17:23,320 Speaker 1: weren't quite sure what some of the atmospheres or environments 320 00:17:23,400 --> 00:17:27,040 Speaker 1: were during different eras. So in the nineteen sixties it 321 00:17:27,080 --> 00:17:30,240 Speaker 1: was discovered that these deposits left in caves and crevices 322 00:17:30,280 --> 00:17:34,680 Speaker 1: by pack rats contained these assemblages of fossil plants, and 323 00:17:34,920 --> 00:17:37,600 Speaker 1: that's when they began to say, okay, um, we can 324 00:17:37,640 --> 00:17:40,240 Speaker 1: look at this and we can figure out what's happening 325 00:17:40,320 --> 00:17:44,520 Speaker 1: during these tens and tens of thousands of years UM. So, 326 00:17:44,760 --> 00:17:48,840 Speaker 1: for instance, since numerous vegetation zones occur over relatively short 327 00:17:48,880 --> 00:17:52,880 Speaker 1: distances in places like the Grand Canyon, the newly discovered 328 00:17:52,920 --> 00:17:55,840 Speaker 1: pac rat middens became a really good tool for comparing 329 00:17:55,880 --> 00:17:59,760 Speaker 1: the Pleistocene vegetation zones with modern ones. And they did 330 00:17:59,760 --> 00:18:03,560 Speaker 1: this by using radiocarbon dating. Yeah, so they could look 331 00:18:03,600 --> 00:18:05,880 Speaker 1: through all those layers and try to figure out what 332 00:18:05,920 --> 00:18:08,320 Speaker 1: was going on when. And then in addition to that, 333 00:18:08,400 --> 00:18:11,480 Speaker 1: the urine actually acted as a bactor aside, so the 334 00:18:11,600 --> 00:18:16,480 Speaker 1: organic material was preserved really well. Now, when future generations 335 00:18:16,480 --> 00:18:17,919 Speaker 1: look back, I can't help but think they'll be a 336 00:18:17,960 --> 00:18:21,600 Speaker 1: gap though, the period during which cowboys ate all of 337 00:18:21,640 --> 00:18:25,120 Speaker 1: the candied urine cakes that the that the pack rats 338 00:18:25,240 --> 00:18:28,119 Speaker 1: left for them in their in their debts, a gap 339 00:18:28,240 --> 00:18:33,000 Speaker 1: in the midden fossil record. Yeah. All you have to 340 00:18:33,040 --> 00:18:36,879 Speaker 1: do is look through there, I'm sure evidence in the 341 00:18:36,960 --> 00:18:40,760 Speaker 1: caves and their droppings to try to find out what 342 00:18:40,800 --> 00:18:43,440 Speaker 1: was going on. Now, one a little bit about the 343 00:18:43,440 --> 00:18:46,680 Speaker 1: pack rat that we neglected to mention earlier is that, Okay, 344 00:18:46,680 --> 00:18:49,840 Speaker 1: you have an animal here that lives almost exclusively on cacti. 345 00:18:50,000 --> 00:18:52,919 Speaker 1: It's just eating loads and loads of cactus and its 346 00:18:52,920 --> 00:18:56,080 Speaker 1: skintting most of its water from the cactus. But there's 347 00:18:56,200 --> 00:18:58,879 Speaker 1: several different toxic plants thrown in here as well. I 348 00:18:58,880 --> 00:19:01,159 Speaker 1: mean you have the juniper, the stage brush, the UK. 349 00:19:01,320 --> 00:19:03,159 Speaker 1: There's a lot of toxin in there, so that the 350 00:19:03,560 --> 00:19:05,600 Speaker 1: animal has to be able to withstand a certain amount 351 00:19:05,600 --> 00:19:08,480 Speaker 1: of toxin, but also interestingly enough sort of manage its 352 00:19:08,560 --> 00:19:12,720 Speaker 1: diet depending on what the toxin levels are. Yeah, and 353 00:19:12,800 --> 00:19:16,800 Speaker 1: this is interesting. Some species or subspecies have actually evolved 354 00:19:16,840 --> 00:19:20,040 Speaker 1: their their kidneys to be able to excrete some of 355 00:19:20,040 --> 00:19:23,359 Speaker 1: the toxins out really well. But what we're talking about 356 00:19:23,400 --> 00:19:27,119 Speaker 1: specifically here are food rats in the deserts of the 357 00:19:27,240 --> 00:19:31,000 Speaker 1: US and the Southwest, where again there's very few food 358 00:19:31,040 --> 00:19:34,800 Speaker 1: resources and you can't really be picky about what's available. 359 00:19:35,840 --> 00:19:39,200 Speaker 1: So they have found, they were found, but they have developed, 360 00:19:39,520 --> 00:19:43,840 Speaker 1: i should say, methods of dealing with this rather toxic appetite. 361 00:19:44,160 --> 00:19:47,960 Speaker 1: They'll sample a number of different toxic items so they're 362 00:19:48,000 --> 00:19:50,320 Speaker 1: not just chowneling down on one thing and potentially getting 363 00:19:50,680 --> 00:19:54,760 Speaker 1: an overload of one particular toxin. They're eating smaller meals, 364 00:19:56,000 --> 00:19:57,479 Speaker 1: which is kind of you know, as humans, we can 365 00:19:57,560 --> 00:20:00,000 Speaker 1: understand that if the food is horrible, you eat less 366 00:20:00,040 --> 00:20:02,840 Speaker 1: of it. They'll increase the time between meals, which makes 367 00:20:02,840 --> 00:20:05,040 Speaker 1: sense too, because there's something toxic in there, you want 368 00:20:05,040 --> 00:20:07,520 Speaker 1: to let your body work through it a little bit 369 00:20:07,520 --> 00:20:10,280 Speaker 1: before you hit it again. And then if water is 370 00:20:10,320 --> 00:20:13,280 Speaker 1: available again they get most of their water through cacti, 371 00:20:13,320 --> 00:20:15,199 Speaker 1: but if there is a water source available, then they 372 00:20:15,200 --> 00:20:18,639 Speaker 1: will drink more water to help compensate for the toxins, 373 00:20:18,680 --> 00:20:20,479 Speaker 1: to try to flush it out. Yeah, it's kind of 374 00:20:20,520 --> 00:20:23,200 Speaker 1: like some like college kids, I guess on a on 375 00:20:23,320 --> 00:20:27,359 Speaker 1: a weekend, you know, drink more water, watch what you eat, 376 00:20:27,800 --> 00:20:31,720 Speaker 1: and and make sure you recharge between toxic excess. Now, 377 00:20:31,760 --> 00:20:35,520 Speaker 1: biology Professor Denise Deering actually compared wood rats or pack 378 00:20:35,640 --> 00:20:38,879 Speaker 1: rats that eat only a single plant, and these are 379 00:20:38,880 --> 00:20:41,680 Speaker 1: called specialists, these these wood rats, and so they would 380 00:20:41,680 --> 00:20:44,360 Speaker 1: eat something like juniper and that wasn't a big deal 381 00:20:44,400 --> 00:20:46,920 Speaker 1: for them because again that their kidneys in their livers 382 00:20:46,960 --> 00:20:50,000 Speaker 1: had evolved enzymes that could break this down. But what 383 00:20:50,119 --> 00:20:53,199 Speaker 1: you're talking about are those generalists, those wood rats. And 384 00:20:53,240 --> 00:20:56,679 Speaker 1: that's where she discovered that they had these different behavioral 385 00:20:56,720 --> 00:21:01,199 Speaker 1: responses in place to try to manage the amount of 386 00:21:01,200 --> 00:21:04,960 Speaker 1: toxins in their bloodstream, which so it's actually pretty clever 387 00:21:05,000 --> 00:21:07,359 Speaker 1: because you think about it, they get the sustenance, but 388 00:21:07,359 --> 00:21:10,880 Speaker 1: they don't keel over with a belly full of poison. Um. 389 00:21:10,960 --> 00:21:14,679 Speaker 1: They get to manage that process. And so she said 390 00:21:14,720 --> 00:21:17,480 Speaker 1: that there's a possibility that they have a sort of 391 00:21:17,640 --> 00:21:21,160 Speaker 1: poison detection system in place. So the generalists are they're 392 00:21:21,160 --> 00:21:25,920 Speaker 1: they're more smart in their management of toxic diet, whereas 393 00:21:25,960 --> 00:21:29,280 Speaker 1: the the specialists are just hardy. They're kind of like 394 00:21:29,320 --> 00:21:32,480 Speaker 1: the Shane mcgallan's of the rodent world, where they could 395 00:21:32,560 --> 00:21:36,080 Speaker 1: they just have a higher tolerance. Well, they just keep 396 00:21:36,200 --> 00:21:38,439 Speaker 1: hitting that one plan over and over again. So it 397 00:21:38,480 --> 00:21:40,240 Speaker 1: makes sense that they would evolve to be able to 398 00:21:40,280 --> 00:21:43,560 Speaker 1: deal with it. Um. But Deering actually says that other 399 00:21:43,600 --> 00:21:47,280 Speaker 1: researchers have found receptors in the guts of other rodents, 400 00:21:47,440 --> 00:21:51,399 Speaker 1: and she thinks that rodents um, particularly the wood rats, 401 00:21:52,160 --> 00:21:57,560 Speaker 1: may be able to detect bitter taste in their gut receptors. Yeah, 402 00:21:58,000 --> 00:22:00,800 Speaker 1: so should they eat it and then their figures out 403 00:22:00,840 --> 00:22:02,840 Speaker 1: what's going on, and then then they get the signal 404 00:22:02,880 --> 00:22:04,400 Speaker 1: we need to drink some water, We need to space 405 00:22:04,480 --> 00:22:07,360 Speaker 1: things out exactly, or let's just not eat a whole 406 00:22:07,440 --> 00:22:09,760 Speaker 1: bunch of this. Let's not gorge on this because you 407 00:22:09,800 --> 00:22:13,399 Speaker 1: know this is toxic. So that's pretty fascinating getting a 408 00:22:13,440 --> 00:22:16,000 Speaker 1: similar thing in my own stomach from the twistle and 409 00:22:16,080 --> 00:22:22,160 Speaker 1: the twist at this point. Yeah, alright, So there there, 410 00:22:22,240 --> 00:22:25,040 Speaker 1: that's the pack rat for you. Again. I'm sure a 411 00:22:25,119 --> 00:22:27,760 Speaker 1: number of you, you guys and gals out there live 412 00:22:27,840 --> 00:22:30,200 Speaker 1: in areas with the pack rat rooms. You may have 413 00:22:30,280 --> 00:22:33,280 Speaker 1: some crazy pack rat stories that have either been handed 414 00:22:33,320 --> 00:22:36,440 Speaker 1: down to you or that you've you've encounted yourself. We 415 00:22:36,480 --> 00:22:38,879 Speaker 1: would love to hear about those, so be sure to 416 00:22:39,000 --> 00:22:41,639 Speaker 1: write in with with those tales. And again, if you 417 00:22:41,680 --> 00:22:45,840 Speaker 1: head out to Arizona spending any time between Phoenix and Tucson, 418 00:22:46,359 --> 00:22:49,360 Speaker 1: go check out the Desert Museum. It's really fascinating. You'll 419 00:22:49,440 --> 00:22:51,720 Speaker 1: learn a lot of stuff, uh, and you get a 420 00:22:51,760 --> 00:22:53,480 Speaker 1: lot of walking and hiking done as well, and you 421 00:22:53,480 --> 00:22:55,199 Speaker 1: get to see you have Alina, which which is a 422 00:22:55,240 --> 00:22:58,720 Speaker 1: treat which is not a pig really more kin to 423 00:22:58,720 --> 00:23:02,840 Speaker 1: a guinea any pig type of creature. But but it 424 00:23:02,840 --> 00:23:06,800 Speaker 1: looks kind of I guess did you ride one. I 425 00:23:06,880 --> 00:23:09,399 Speaker 1: did not write one. They're they're vicious. They will they'll 426 00:23:09,520 --> 00:23:12,880 Speaker 1: tusk you man. But yeah, so go check that out. 427 00:23:13,119 --> 00:23:15,040 Speaker 1: Anyone out there listening to us, if you would like 428 00:23:15,119 --> 00:23:17,800 Speaker 1: to share any of your tales with us about the 429 00:23:17,800 --> 00:23:19,880 Speaker 1: pack Rat, or if you want to talk about any 430 00:23:19,880 --> 00:23:22,080 Speaker 1: other episodes we've done in the past, you can find 431 00:23:22,119 --> 00:23:24,720 Speaker 1: us on Facebook and tumbler. We are stuff to blow 432 00:23:24,760 --> 00:23:27,400 Speaker 1: your mind on both of those, and we also tweet. 433 00:23:27,640 --> 00:23:31,160 Speaker 1: You can find our Twitter account by our handle blow 434 00:23:31,200 --> 00:23:33,440 Speaker 1: the Mind, and you can also drop us a line 435 00:23:33,480 --> 00:23:42,480 Speaker 1: and blow the mind at Discovery dot com for more 436 00:23:42,520 --> 00:23:44,800 Speaker 1: on this and thousands of other topics. 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