One of mercury's cool properties!

Did you know that a human can float on top of a pool of liquid mercury? Some of you science peeps are probably saying, “DUH, it’s extremely dense and a ‘heavy’ metal!”, but did you know that people actually did this? The photo of the miner below is from a 1972 issue of National Geographic, back before people realized that sitting on top of a giant pool of liquid mercury, as it continuously vaporized and you inhaled it, was not very good for your health. 

How I found this photo: from Theodore Gray’s website - a man who collects samples of all the elements in the periodic table, even the poisonous ones. 

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