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Survivalist Pro
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The kangaroo rat never has to drink water—it just gets it from the seeds it eats.
The juice itself won't promote weight loss, but calorie control will. Veggie juice in particular can be fairly low calorie, and if done right, a...
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The average cost of food per month for one person ranges from $150 to $300, depending on age. However, these national averages vary based on where...
Read More »During hot, dry periods, this Australian frog secretes a waterproof mucus cocoon that prevents moisture from escaping its body. Meanwhile, the frog hibernates underground, waiting for another rainy season. It can survive for two years or more on the liquid stored in its bladder. Michael Brandon Myers In the most arid places on the planet, hydration is hard to come by and easy to lose. Every moist breath exhaled, every bead of sweat that drips off, and every emptied bladderful of urine means wasted wetness and a greater risk of death by dehydration. Yet some animals manage to survive in these places. They get by on almost no water at all, thanks to clever adaptations that make them super savers and hydration scavengers. Tortoise In the Mojave and Sonoran deserts, several tortoise species survive off their urine. During times of plenty, their bladders swell to hold around 16 ounces of liquid gold—impressive for a reptile that’s only about 12 inches long. The tortoise can later reabsorb water from its urine to endure a year or longer without a drink. Kangaroo Rat The kangaroo rat never has to drink water—it just gets it from the seeds it eats. To survive in the dry climes of the American West, its kidneys generate super-concentrated urine, and it doesn’t pant or sweat. Some species can even lower their metabolic rates so they lose less moisture through breathing. Thorny Devil The spikes of Australia’s thorny devil do more than ward off predators. The lizard’s absorbent skin and spines suck up dew from cool night air, rain, puddles, and any other moisture it can get its dry little claws on. Thin grooves in its skin help trap the water, then route it to the lizard’s mouth for a tipple. Water-Holding Frog During hot, dry periods, this Australian frog secretes a waterproof mucus cocoon that prevents moisture from escaping its body. Meanwhile, the frog hibernates underground, waiting for another rainy season. It can survive for two years or more on the liquid stored in its bladder. Camel Camels don’t actually store water in their humps, so they have to conserve it. At night, after the chilly Saharan air cools the camel’s nasal cavity, mist in its breath condenses inside its nose, where it gets reabsorbed. The camel’s extra-twisty nasal passages save up to 60 percent of the moisture it would have lost during exhalation. Sand Gazelle Sand gazelles in the sweltering Arabian Desert have evolved the strange ability to shrink their oxygen- demanding organs when dry spells hit. Downsizing their hearts and livers by 20 and 45 percent, respectively, allows them to breathe less. Taking fewer breaths means less water lost to respiratory evaporation. This article was originally published in the March/April 2017 issue of Popular Science, under the title “Moisture Misers.”
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