-advertisement-
10%

Steven set the alarm at nine o`clock and went to sleep at eight o`clock. How many hours did Steven sleep?

Fact Lab

-advertisement-

Interesting fact:

The answer to the previous question is the tongue! That’s right, this gymnast of a muscle is made up of mainly skeletal muscle. It doesn’t need to surround any supporting bones and it makes constant changes to handle all our eating, swallowing, and of course, speaking!