See the stunning images in the 4th annual International Drone Photography Contest
The payout for the multi-state game is expected to be the second-largest in U.S. lottery history.
Dec. 17, 2013A sign advertising the $636 Million Mega Millions lottery jackpot hangs in a convenience store's window in Chicago.The jackpot is the second-largest in U.S. history.Scott Olson/Getty Images
The contest is accepting entries in one or all of four categories: wildlife, landscapes, underwater and aerials. The grand-prize winner will receive $10,000, publication in National Geographic Magazine and a feature on National Geographic’s Instagram account.