A magnet is dropped on a cold block of copper and all sorts of awesome science ensues.

Read/comment on full post

There’s nothing intrinsically “floaty” about helium. You can make a helium balloon that sinks, if it’s cold enough, as we see in this video.

Read/comment on full post

Liquid oxygen is collected on a pretzel, and when lit it burns like a Roman Candle!

Read/comment on full post