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New Lakes Discovered Under Greenland Ice Hint at Warming

Live Science: The discovery of two large lakes hidden beneath Greenland's ice suggests that climate change now cuts all the way to the bottom of the ice sheet, according to two new studies. The lakes, on opposite coasts, were only spotted because meltwater from Greenland's surface triggered gushing floods in the fall of 2011. Billions of gallons of water had flushed some 30 miles (50 kilometers) to the sea, leaving behind sunken craters in the surface of the ice above the lakes. Researchers found the fractured...

Alien Giant Tortoise Helps Restore Ecosystem

Live Science: as alien species can sometimes do -- a giant tortoise appears to be helping to restore the native ecosystem. Wildlife scientists introduced Aldabra giant tortoises -- which can reach up to 661 pounds (300 kilograms) -- to an island, called Ile aux Aigrettes, off the coast of the island nation of Mauritius. By 2009, 19 adult giant tortoises called the island home. The tortoises were to replace the role of their extinct kin. [Extinct Giant Tortoises Could Be Revived] Before humans first arrived...