ANIMAL BEHAVIOR
When Snot Is Cool
An Australian animal called the echidna (ih-KID-nuh) is pretty weird. It’s a mammal that lays eggs. It’s covered in spikes and has a long, skinny snout. Now scientists have found one more thing that makes echidnas special: They keep cool in hot weather by blowing snot bubbles.
Echidnas can’t sweat to cool off, like we do. They don’t pant like dogs, either. In the summer, they mostly hide during the heat of day and come out at