Forget chocolate melting in your hands, try Gallium. Its a strange metal that has a melting point at 85 degrees (F). Pick up a solid piece of gallium and squeeze it in your hand for a few minutes. Soon, you’ll have a liquid puddle of metal jiggling in your hand. Scientists love to show off experiments with Gallium. Set a drop on an aluminum can and watch it slowly turn the aluminum into brittle tissue paper. Set the stuff in sulfuric acid and you’ll see it start beating like a heart. Dmitri Mendeleyev first predicted Gallium and placed it in the Period Table before it was officially discovered in 1875.