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A large portion of Greenland was an ice-free tundra landscape鈥攑erhaps covered by trees and roaming woolly mammoths鈥攊n the recent geologic past, new UVM-led research shows. This indicates that the ice sheet on Greenland may be more sensitive to human-caused climate change than previously understood鈥攁nd will be vulnerable to irreversible, rapid melting in coming centuries.Green LandDuring the Cold War, a secret U.S. Army mission, at Camp Century in northwestern Greenland, drilled down through 4560 feet of ice on the frozen island鈥攁nd then kept drilling to pull out a twelve-foot-long tube of soil and rock from below the ice. Then this icy sediment was lost in a freezer for decades. It was accidentally rediscovered in 2017 and shown to hold yeezys not just sediment but also leaves and moss, remnants of an ice-free landscape, perhaps a boreal forest.But how long ago were those plants growing鈥攚here today stands an ice sheet two miles thick and three ti converse plateau mes the size of Texas?A nike dunken low n international team of MEXICO CITY:Mexican archeologists have discovered a canal system under the pyramid containing the tomb of a Mayan ruler, suggesting the water tunnel could represent a symbolic path to the underworld.The hydrauli adidas campus beige c system was found under the Temple of the Inscriptions, which houses the seventh-century tomb of Pakal "The Great" in Palenque, the ancient Maya city in southern Chiapas state, the National Anthropology and History Institute announced Monday.An adidas original campus cient archaeological sites victim of neglect"The presence of these canals is very important and very significant," said Arnoldo Gonzalez, the directory of archeology in Palenque.An inscription in the tomb says that to be accepted in the underworld, the dead must be submerged in the water of a god cal new balance 480 led Chaac.The underground network of canals has different levels and goes in different directions, and it was built "well before" the pyramid, according to the national anthropology institute.Water was still running through the main canal when