Deep-sea mysteries - A 5-week research mission in the Atlantic

Aboard the research vessel Meteor, scientists venture into the vast Atlantic. Five weeks in tight quarters push the team beyond its limits. Their mission: to study unknown species and habitats at the bottom of the sea.

It's 3 a.m. in the middle of the Atlantic, and Meteor is surrounded by darkness. But the 58 men and women on board are wide awake. All eyes are on the ship's crane as it hauls a "box corer" - a mechanical sample collector - from a depth of five kilometers. The heavy seas cause it to slam against the ship's hull.

The immense pressure levels involved in deep-sea research require heavy-duty equipment, with parts made of steel and even titanium. But when the crew finally manage to get the sample box back on deck, they find it's empty: containing only water and no seabed sediment. After the immediate disappointment, they soon set about preparing the next attempt before sunrise, because time - and money - are of the essence on this five-week expedition.

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