"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these ...

Sound moves faster in water…? We may need fish to get us to Mars…? There was a robot in the 15th century…? Here are fun facts about science… WATCH OUR OTHER VIDEOS: ►25 Shocking Scientific Predictions ...

Space questions everything about what we know about existence and consists of gigantic stars, icy comets and distant worlds ...

Discover interesting facts about where sharks live, how big they can get, and how likely it is to get bitten by one. When you purchase through links on our site, we may earn an affiliate commission.