Scientists studied ear muscles in people. Scientists played sounds. People listened. They used their ear muscles when they were trying to hear.
Photo Credit: ia_64/Getty Images
In the Know
Do All Birds Fly?
Look at the penguin. Penguins cannot fly. Their wings are … read more
In the Know
Marian Anderson: The Woman Who Sang for a Nation
February is Black History Month. Let’s Learn about Marian Anderson. … read more
In the Know
How We Explore Space
World Space Week begins October 4th. It ends on October … read more