Large, unmanned aerial vehicles look like regular (albeit menacing) airplanes. But there are also small drones that resemble big insects, and they're being programmed to act like them too. Insectile drones could evolve into useful minions to track, map, and respond to climate change.
Deep in the driest and hottest part of Israel, a California-born botanist is trying to remake the Negev Desert with productive trees that thrive on abuse.