Simulating path of 'magma mush' inside an active volcano

Months of warning signs from Mauna Loa, on Hawaii's Big Island, prompted the U.S. Geological Society to recently start releasing weekly updates on activity at the world's largest active volcano.

Three years after Gulf spill, BP fights huge fines

Three years after a deadly explosion on a BP-leased drilling rig unleashed the worst environmental disaster in US history, the British energy giant is fighting to avoid billions in fines.

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