There are an endless number of obstacles to exploring space. Lack of oxygen, radiation, meteoroids and more. This is a video that explains what happens if you enter space without a space suit. Take a peek!

Hey Doodlebugs! Check out some of these zentangles!

Buoyancy is the ability to float. If you want to explore underwater you need to sink and resurface. How does the Cartesian Diver work? Check out this video!