ANCHORAGE - Woolly mammoths and other large ice age mammals thrived in northern Alaska until environmental changes turned grasslands into peat and rising sea levels submerged the Bering Land Bridge, cutting off their access to Asia, according to a research paper published Monday.Researchers from the University of Alaska Fairbanks and the University of California studied bones of ice age horses, steppe bison, mammoths and other animals to determine why they died out in what's now Arctic Alaska.
NEW YORK - The U.S. death rate has been falling for decades, but researchers have detected one group in which the rates have been steadily ticking up - middle-aged white people. Suicides and deaths from drug overdose and alcohol abuse are being blamed.
ANCHORAGE - Though Arctic Alaska is warming and permafrost is thawing, the area so far has been spared from the scourge of excessive methane emissions, according to data collected by a NASA-managed research project.
FAIRBANKS - Researchers have uncovered the remains of two Ice Age infants in Alaska's interior, a discovery archaeologists call the youngest human remains from that era found in northern North America.
Researchers have uncovered the remains of two Ice Age infants in Alaska's interior, a discovery archaeologists call the youngest human remains from that era found in northern North America.
Revised age estimates of American mastodon fossils in Alaska and Yukon have resolved a quandary about when these extinct relatives of elephants lived.
Recent studies show plant life in Alaska's northern forests is declining, while the tundra is seeing accelerated growth triggered by rising temperatures and concentrations of carbon dioxide.
A cascading decline in seal, sea lion and sea otter populations in the North Pacific may have been triggered by industrial whaling after World War II that forced packs of killer whales to look for new sources of food, a group of scientists suggest. "If our hypothesis is correct, either wholly or in significant part, commercial whaling in the North Pacific Ocean set off one of the largest and most complex ecological chain reactions ever described," the scientists wrote in an article appearing this week on the Proceedings of the National Academy of Sciences Web site.
One of the great success stories of the ocean, the return of the Pacific gray whale, may have been based on a miscalculation, scientists reported Monday in a study based on whale genetics.
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