
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
Many communities have murals. Murals are big paintings. They depict … read more
Mario Molina studied chemicals. He learned about bad chemicals in … read more
Long ago, a powerful leader bullied people who were different. … read more
© 2025 McGraw-Hill Education. All Rights Reserved.