A subglacial eruption is underway at the Bardarbunga volcano in Iceland. Seismic data indicates that lava from the volcano is melting ice beneath the Vatnajokull glacier. An eruption that could cause "significant emission of ash into the atmosphere."
The discovery of bacteria in an ice-bound lake bolsters the case that similar life could exist elsewhere in the solar system. But on Earth, the find raises the prospect that Antarctic melting will release greenhouse gases.
If the Pacific Remote Islands Marine National Monument becomes a marine reserve, it would double the area globally subject to tight fishing restrictions. Other countries are also working to expand the area of such ocean havens.
When Iceland's Grimsvötn volcano became active in April 2011, its explosive eruption sent ash plumes into the sky, disrupting flights in northwestern Europe for three days. Bardarbunga is another under-ice volcano.