Researchers were inspired by the ray’s energy-efficient flappy fins.

Like out of a movie, this fish keeps swimming without being alive, but the explanation lies in its very nature.

With a visit to Nusa Islands (Nusa Penida, Nusa Lembongan and Nusa Ceningan), you can enjoy Kelingking Beach, Manta Bay or ...

Sea otters in California are helping to protect kelp forests from an invasion of purple sea urchins. NBC News' Gadi Schwartz ...