This crumb-sized camera uses artificial intelligence to get big results

Researchers have developed a tiny camera that takes amazingly clear photos. At the size of a coarse grain of salt, you may never find it again. Smaller cameras could mean lighter smartphones and new James Bond–style gadgets. Cameras on this scale could swim through the body, hitch a ride on an insect, scope out your brain or monitor hostile environments. And those are just a few of the possibilities.