31:23

Transformer des vieux bijoux en lingots d’or‌

29:57

Making a bismuth knife to undo an injustice

35:49

Attempting to make transparent wood

29:55

I sold so much PAWN that I bought a house!

26:16

Can you GROW an Opal?

25:38

Lave contre Laser - Lequel sera le plus destructeur ?

34:10

Making a deadly chemical in my parents' garage

28:56

The clever feature that makes cheap heaters safe — and why they're actually dangerous