Know That?

Know that wood is made mostly of thin air?

Know That? explains the surprising science behind everyday things (your house, your yard, your kitchen) in about a minute. Every video opens with a question and ends the same way: did you know that?

Our kids pick the questions. We dig up the answers, check them, and animate them.

Got something you've always wondered about? Leave it in the comments, and it might be the next episode.