• Isaac dropped unrelenting rain Thursday, flooding areas north and south of New Orleans, and officials had to scramble to evacuate and rescue people.

    LAST UPDATE : Dec 05, 2012, 10:30 PM EST
  • Isaac bore down on New Orleans, testing the city's new levee system.

    LAST UPDATE : Dec 05, 2012, 6:30 PM EST
  • The University of Tromso's research vessel Lance follows US Secretary of State Hillary Clinton and Norway's Minister of Foreign Affairs Jonas Gahr Stoere's tour of a fjord onboard the Arctic Research Vessel Helmer Hanssen off Tromsø, Norway, in the Arctic Circle, June 2, 2012.

    Critical ice in the Arctic Ocean melted to record low levels this sweltering summer and that can make weather more extreme far away from the poles, scientists say.

    LAST UPDATE : Dec 05, 2012, 2:00 PM EST
  • Greenpeace activists including Executive Director of Greenpeace International, Kumi Naidoo, board energy giant Gazprom's Arctic oil platform Prirazlomnaya off the North-eastern coast of Russia in the Pechora Sea on Friday, Aug. 24, 2012. Greenpeace activists have stormed a floating oil rig in Russia’s Pechora Sea to protest oil drilling in the Arctic, the environmental organization said on Friday.

    Greenpeace activists stormed a floating Russian oil rig early Friday in the open sea to protest oil drilling in the Arctic, the environmental organization said.

    LAST UPDATE : Dec 05, 2012, 10:30 AM EST
  • In this June 25, 2012 file photo, a crew works on a drilling rig at a well site for shale based natural gas in Zelienople, Pa.

    A new global fund on climate change that aims to channel $100 billion a year in aid to poor countries selected officials from South Africa and Australia as its leaders at its first meeting Thursday.

    LAST UPDATE : Aug 24, 2012, 5:57 PM EDT
  • In an undated photo provided Monday, Aug. 21, 2012, by Captain David Anderson's Dolphin and Whale Safari in Dana Point, Calif., spectators watch whales off the coast of southern California.

    Tourists from around the world have been flocking to Monterey Bay to catch a glimpse of the massive marine mammals, including impressive numbers of blue whales, the largest animals on earth.

    LAST UPDATE : Aug 23, 2012, 7:25 AM EDT
  • The "wave glider", which from above looks like a yellow surfboard, picks up signals from tagged fish up to 1,000 feet (330 metres) away as part of efforts to understand the giant predators.

    LAST UPDATE : Aug 25, 2012, 9:58 AM EDT