Michael Lee evaluates the best teams in the National Basketball Association.
1. Oklahoma CityWith Kevin Durant and Russell Westbrook leading, the Thunder revealed an extra gear in recent wins over Miami and the Lakers that might propel it to greater playoff success. Last week: 3Mark J. Terrill/AP
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.