Robots are already good at sorting things, so wouldn't it be nice if they could sort things out on a much smaller scale? They might soon. Caltech researchers have developed a 'robot' made from a single DNA strand that autonomously picks up molecules and moves them to specific places. It certainly doesn't look like a machine (what you're seeing above is merely representative), it behaves like one. Each segment is a collection of nucleotides that automatically performs a specific task: one segment tells the bot where to go, while separate limbs help it move around and grab molecules.