Kangaroos live in Australia. And it gets really hot in Australia. Like 120° F Hot. And sometimes there isn’t very much water.

So fortunately, pregnant kangaroos have the ability to slow down embryo development during a drought.

Other kangaroo fun facts:

• They lick themselves to cool down. Their blood vessels are close to their skin, and when the saliva evaporates it cools the blood underneath, which in turn cools down their whole bodies. It’s true. I saw thermal camera footage to prove it.
• The soil a few inches down is significantly cooler than the topsoil. So in addition to licking themselves, they dig down a few inches and lay in the cooler dirt.

Source: Planet Earth on The Discovery Channel