A Russian spy ship seen in U.K. waters points to continuing worries over the safety of undersea cables that link the global economy.

North of the California border, scientists just found 21 trillion gallons of water hiding in the cracks of volcanic rock.

The discovery could have implications for water users in the region as drought and extreme weather limit snowpacks, rainfall ...

Major economies are heading toward a "population collapse" by 2100 because of falling fertility rates, new research has found ...

When my son was 2 years old, he drew a really beautiful picture of swirls, scribbles and dots ... with a rock on the side of ...