A researcher at the Woods Hole Oceanographic Institution visited Palau and took a dive in the tiny island nation's Jellyfish Lake, and captured video of a swarm of Mastigias.
One year after the Deepwater Horizon blow-out began the worst oil spill in US history, scientists continue to investigate the effects of the oil and its residues.
French authorities say they have found the engine and parts of the fuselage of the Air France plane that crashed in 2009 off Brazil's coast.
Air France Flight 447 plunged into the ocean en route from Rio to Paris, killing all 228 passengers and crew. The latest search found a section of the aircraft, including bodies, and raised hopes that the black boxes will be found to explain what happened.
A recent study found that squids can detect low-frequency sounds, using sac-like organs at the base of their brains.
Scientists had thought the Haiti earthquake a year ago released stress on a well-known fault. It didn't. Instead, it revealed faults that scientists didn't know existed.