Drones can provide information about temperature, humidity and pressure that current radar systems can't provide. Above, the Talos drone, which has a 15.5-foot wingspan.
Jamey Jacob/Oklahoma State University
Paul Applewhite of Applewhite Aero isn't allowed to fly this 3-pound Styrofoam plane. That's because he has added circuitry to make it autonomous — it can find its way to specified coordinates — which means it's an unmanned aerial vehicle requiring a special testing permit.