Mario Molina was born in Mexico. As a little boy he played with toy chemistry sets. Mario Molina became a chemist.
Photo Credit: Louis MONIER/Gamma-Rapho/Getty Images
In the Know
Special Money
The United States Mint makes the money we use. The … read more
In the Know
Why Can You See Your Breath When It’s Cold Outside?
Brrr! It’s getting cold outside. Some days, you might be … read more
In the Know
Endangered Animals
There are 8.7 million species of animals in the world! … read more