Earth
Grey whales took to high seas to survive the ice ages
Clues to how these ocean giants survived the last ice age may be lurking in a population of grey whales off the Canada's Pacific coast
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Clues to how these ocean giants survived the last ice age may be lurking in a population of grey whales off the Canada's Pacific coast
Colorado's baby-boomer marmots have been getting fatter and their population has been swelling 鈥� the changes seem to be caused by the warming climate