An blue whale’s heart is the size of a small car.

Likes

THANK YOU

Your comment will be checked and approved shortly.

Find out all about these incredible invertebrates!

Learn all about the great white shark!

Learn all about this magnificent marine mammal!

Learn about these seriously super swimmers…

Type whatever you want to search

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.