Mercury, the sweetest of the transition metals!
March 6, 2015 7:38 AM Subscribe
Mercury is such a dense liquid that cannonballs float in it. Humans float on it too (you'll have to scroll down a bit for the picture), but it's probably not a good idea. If you just can't resist hopping in the mercury vat, elemental mercury is less likely to kill you than mercury compounds. It used to be sold as a laxative (officially branded Dr. Rush's Bilious Pills but colloquially known as "thunder clappers"); Lewis and Clark's campsites can sometimes be identified by the mercury they deposited along the way.
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