Earth
Major highways are a hard cross to bears
Grizzly bears' reluctance to cross roads in the northern US and southern Canada is putting their populations at risk as a result of genetic isolation
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Grizzly bears' reluctance to cross roads in the northern US and southern Canada is putting their populations at risk as a result of genetic isolation
The facts about climate change are leaving sceptics with nowhere to go - much like the flowers, birds and amphibians abandoning old haunts to escape extinction