Cockatoos Solve Intricate Puzzle

Published On: Jul 08 2013 06:52:14 PM EDT   Updated On: Jul 08 2013 04:56:58 PM EDT

The Indonesian birds could see a nut behind a transparent door, but to get to it, they had to remove a pin, a screw, and a bolt; turn a wheel 90 degrees; and shift a latch sideways.