Draft rule ends protections for gray wolves

Federal wildlife officials have drafted plans to lift protections for gray wolves across the Lower 48 states, a move that would end a decades-long effort that has restored the animals but only in parts of their historic range.

New research discovers metabolic adaptation to high altitudes

When mammals are cold, they can employ physical changes to stay warm -- such as intense shivering. Like any form of aerobic exercise, though, "shivering thermogenesis" is especially challenging at high altitudes because there ...

Mountain caribou's ancient ancestry revealed

The declining mountain caribou populations of Canada's southern Rockies are a more distinct breed than scientists previously believed, according to a new study by University of Calgary researchers that is shedding light on ...

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