If you could touch your brain it would feel like toothpaste.

Likes

THANK YOU

Your comment will be checked and approved shortly.

Explore the astonishing forces that keep aeroplanes in the sky…

Learn about one of the most influential scientists of our time…

Learn all about the human eye…

X-rays are under the microscope with Dr Karl…

You’re leaving natgeokids.com
to visit another website!

Ask a parent or guardian to check it out first and remember to stay safe online.

You're leaving our kids' pages to visit a page for grown-ups!

Be sure to check if your parent or guardian is okay with this first.