
Mario Molina studied chemicals. He learned about bad chemicals in the air. The chemicals were hurting the environment. Mario Molina wanted to help protect Earth.
Photo Credit: (c) Ingram Publishing/SuperStock
Pangolins have strong, sharp claws. They use their claws to … read more
Do you know how to make a big splash? A … read more
How are restaurants changing for COVID-19? In the summer, restaurants … read more
© 2025 McGraw-Hill Education. All Rights Reserved.