What if I tell you that you can weld two pieces of metal together with your own hands in outer space? Will it be true or false? Think a little. And that would be... true! Hypothetically, it indeed is possible. You need just to press them to each other and voilà! In the Earth's atmosphere, oxygen creates a thin oxide layer on the metal's surface, which acts as a barrier. But it doesn’t work like that up in space where elements stick together if they come into contact with each other, as it happens during cold welding. Did you know that? No? Do you feel like taking a space quiz? You’ll find out: can you be stabbed in space by... rain? Can you get burned by tears? And most importantly, how much do you know about space?