Can Metal Negotiate a Maze by Chemical Reaction?

Sometimes chemical reactions are so cool that you don't need to fully understand them to be fascinated by them. Here's an experiment in physics and chemistry that will blow your mind. There aren't many metals that are liquid at room temperature. Besides mercury, there's an alloy called galinstan that's composed of gallium, indium, and tin. It has such a low melting point that it can be used as a substitute for mercury, which is quite toxic.

James Orgill of The Action Lab explains some of the properties that make galinstan so darn cool. It reacts with other chemicals in a way that animates it like the metal blobs are living things. But because these reactions are purely chemical and physical, they can be controlled. Can he make a blob of galinstan find its way through a maze? You bet! There's a skippable ad from 4:48 to 6:16. (via Damn Interesting)