NASA is testing tiny nuclear reactors that can sustain life on Mars

Mars is very much en vogue right now. NASA is focused on exploring Mars, SpaceX CEO Elon Musk wants to colonize Mars, and astronomers all around the world want to learn more about Earth's nearest neighbor. The discovery earlier this month that the planet is hiding massive water ice reserves just beneath its surface could have far-reaching ramifications, possibly giving future humans on Mars easy access to water supplies. Of course, humans would need more than water to survive on Mars. Scientists...