"cbsIt's not just birds and planes in the sky anymore -- drones are on the rise. But how much do we know about the flying machines? As the technology progresses, it appears that the aerial devices are also getting smarter.

Drones come in a variety of shapes and sizes that range from the small, radio-controlled devices flown by hobbyists to military machines larger than a human. But there are a few ways to identify and categorize them."

Contine reading the CBS article that features and interview with Dr. Humphreys.