
Some mummies are very old. Scientists can learn from mummies. Archaeologists study people of the past. They study mummies.
Photo Credit: Pool Photo/Alamy Stock Photo
Mario Molina studied chemicals. He learned about bad chemicals in … read more
Plastic is bad for the Earth. Find ways to use … read more
Winter birds have adaptations that help them stay warm. Winter … read more
© 2026 McGraw-Hill Education. All Rights Reserved.