Is fire a solid, a liquid, or a gas? - Elizabeth Cox
25:12
The Physics of Flame - What is Fire, Really?
21:19
The Chemistry of Fire
3:39
What Is Fire?
5:26
Do you really need to take 10,000 steps a day? - Shannon Odell
5:37
What staying up all night does to your brain - Anna Rothschild
5:08
Why incompetent people think they're amazing - David Dunning
4:52
What would happen if you didn’t drink water? - Mia Nacamulli
5:49