Hiding a Nobel Prize From the Nazis

So much chemistry here.

Great explanation of a famous story of Neil Bohr's lab - particularly George de Hevesy - dissolving two gold Nobel prize medals to hide them from the Nazis...and then precipitating the gold back out of solution a decade or so later once the Nazis had been defeated.

It's a great story, and the science - full d-shells, equilibrium, Le Chatelier's principle - is outstanding. The story itself is better told in this NPR post from Same Kean's The Disappearing Spoon book, but Kean doesn't go into the science as well as Hank Green does here.