From mindbendingly lightweight solids used by NASA to metals that melt in your hand, here are a few of the neatest chemicals around, sourced from this Quora thread. This remarkable gel is the ...

It melts in your hand, can be used to make a gag spoon, and can turn a typical soda can into mush. The aluminum on a can amalgamates with the Gallium, and the end result is amazing to watch.