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Searchers find second Air France crash black box

Search parties scouring the sea bed off Brazil's northeast coast have recovered the second of two flight recorders from the Air France aircraft that crashed into the Atlantic in 2009, investigators said on Tuesday. Full story

Review lays no blame for San Diego dolphin deaths

The Navy has concluded that it would have been dangerous to stop an underwater training blast believed to have killed three or four dolphins last month off San Diego Bay. Full story

Scientists: Gulf health nearly at pre-spill level

Scientists judge the overall health of the Gulf of Mexico as nearly back to normal one year after the BP oil spill, but with glaring blemishes that restrain their optimism about nature's resiliency, an Associated Press survey of researchers shows. Full story

Hopes raised for recovery of AF447 black boxes

The rear section of an Air France jet that crashed off Brazil's coast in 2009 remains relatively intact on the ocean floor, raising hopes the plane's "black boxes" may still be attached to the wreckage, family of some victims said Tuesday after being briefed by officials. Full story

Tsunami can reach speeds above 620 mph

   TODAY’s Al Roker explains what happens beneath the ocean floor to cause an earthquake that triggers a fast-moving tsunami to erupt.

Deal reached on fishing in Northeast Pacific

Countries bordering the North Pacific Ocean have struck a deal that environmentalists said Monday will help protect 16.1 million square miles of ocean floor from a destructive technique called bottom trawl fishing. Full story

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Articles

Mountains conquered in mapping voyage at sea

Scientist finds Gulf bottom still oily

A sea change: Nuclear reactors on ocean floor

How deep can life go?

Dead whales foster ocean of life

Huge microbe community may be deep under ocean floor

Deep Sea Lavas Bake Sediments, Add to Warming

Researchers check Gulf oil spill for coral killers

Feds: Seepage near BP cap is from another well

Scientists find surprises in deep Atlantic Ocean

Video

  Scientists explain new Titanic images

NBC News’ Kerry Sanders reports on new images of the Titanic debris spread across the sea floor as they emerge.

  First pictures from Titanic expedition

NBC's Kerry Sanders has the first images from an expedition that is mapping the Titanic's final resting place on the bottom of the North Atlantic in 3D.

  Cap to remain on well despite seepage

While officials aren't sure if seepage near BP’s just-capped well is connected to the spill site, they say the issue is not serious enough to have engineers adjust the containment cap. NBC’s Anne Thompson reports.

  Oil leaking from cap on ruptured well

Evidence of leaks from the bottom of BP's oil well as well as seepage on the ocean floor cast doubt on BP's ability to keep the busted well plugged until a relief well is completed. NBC's Anne Thompson reports.

  Is low pressure bad sign?

BP and federal officials remain cautiously optimistic that the new cap has killed the well that pumped thousands of barrels of oil into the Gulf of Mexico for 87 days, but engineers aren’t sure what to make of the low pressure readings coming from equipment nearly a mile below the surface. Following

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Related Photos

A World War Two era German Dornier 17 bomber is seen using high-tech sonar equipment, showing it to be largely intact and well-preserved on the sea floor
A World War Two era German Dornier 17 bomber is seen using high-tech sonar equipment, showing it to be largely intact and well-preserved on the sea floor

A World War Two era German Dornier 17 bomber is seen using high-tech sonar equipment, showing it to be largely intact and well-preserved on the sea floor, in an undated photo off the Kent coast. A rare World War II German bomber shot down over the English Channel, hidden for years by shifting sands