Mammals use moisture to cool off when they are hot. Cats lick themselves. Dogs pant. Some animals spit on themselves. Echidnas blow snot bubbles to cool off!
Photo Credit: Getty Images/Flickr RF/Arianna Palazzi
In the Know
Where Is Water on Earth?
Some of the water is frozen. Snow is made of … read more
In the Know
What Causes It to Happen?
A stop sign causes traffic to stop. We can cross … read more
In the Know
New Olympic Sports
Another new sport is surfing. Surfers ride waves. They ride … read more