Energy from Earth's interior supports life in global ecosystem

The Earth's oceanic crust covers an enormous expanse, and is mostly buried beneath a thick layer of mud that cuts it off from the surface world. Scientists now document life deep within the oceanic crust that appears to be ...

Source of persistent Gulf sheen remains a mystery

Officials say underwater inspections at the site of BP's Deepwater Horizon rig disaster have failed to identify the source of a persistent sheen on the surface of the Gulf of Mexico.