MIT just invented X-ray vision--sort of

In the scope of enviable superpowers, X-ray vision has always seemed like the most practical and plausible of the bunch. Now plausibility has turned into reality, thanks to new technology coming out of MIT. A team from MIT's Computer Science and Artificial Intelligence Lab has developed technology that's able to see human movement through walls. Instead of using electromagnetic radiation to produce imagery, the researchers have found a way to use low-power radio waves to track the movement and figure of humans through a wall. The simple explanation is this: A device sends weak radio waves through a wall where they're able to bounce off humans, whose bodies are natural reflectors thanks to their predominantly watery makeup.