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
What Do Engineers Do?
Engineers solve problems. They make new things. They make old … read more
In the Know
Fourth of July
This month, we celebrate the Fourth of July. What does … read more
In the Know
What Can Clouds Tell Us?
Clouds can be different shapes. They can be different sizes. … read more