Possibly the creepiest thing we’ve seen all season, here’s mercury(II) thiocyanate’s decomposition initiated by heating. The terrarium adds a nice effect, like we’re watching some kind of sand monster out of Star Trek. Video queued to 1:20, when the action starts. One Facebook commenter noted, “I guess when you burn mercury thiocyanate, it opens up a portal to hell.” [Thanks, Laura!]

More:

Mercury thiocyanide = gross/awesome

In the Maker Shed:

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Illustrated Guide to Home Chemistry Experiments