How do we know about ice ages? Scientists study ice. Scientists study clues from glaciers. Scientists study fossils.
What Do You Think? How did humans live during the ice age?
Photo Credit: Corbin17/Alamy Stock Photo
In the Know
Ruby Bridges Goes to School
This is Ruby Bridges in 2011. She visited the White … read more
In the Know
Maria Telkes – Scientist known as the Sun Queen
Maria Telkes helped design the first solar home. It was … read more
In the Know
What Is Infrastructure?
You hear the word infrastructure in the news. But what … read more