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Below the waves off Germany's northern tourist beaches, a toxic time bomb lurks on the Baltic Sea floor -- enormous ...

As bubbles rippled across the frigid Finnish lake, diver Daan Jacobs emerged from a hole carved out of the thick, crackling ice. The journey had taken him 8 meters (26 feet) beneath the surface, where ...

For more than 160 years, the National Academies have provided nonpartisan, evidence-based advice on decisions that affect our nation. Browse the listing of projects and activities to see examples of ...