Watch An Engine Powered By Evaporation Drive A Car

Evaporation is one of the givens here on Earth, right up there with death and taxes. At any given moment, water is evaporating from the ground or oceans and entering the air in massive quantities.Now, some researchers think they may have figured out a way to harness that process to create an endlessly renewable energy source. In a paper published today in Nature Communications scientists at Columbia announced that they had figured out a way to build an evaporation engine capable of producing power. The secret? Bacterial spores.In nature, bacterial spores expand when exposed to water, and…