Related topics: climate change · climate

What drives Yellowstone's massive elk migrations?

Every spring, tens of thousands of elk follow a wave of green growth up onto the high plateaus in and around Yellowstone and Grand Teton national parks, where they spend the summer calving and fattening on fresh grass. And ...

A shady spot may protect species against rapid climate warming

Finding a shady refuge to cool off on a hot day could be more than a lifesaver in a warming world. It might save several species that would otherwise go extinct due to global warming, according to an analysis by ecologists ...

Old ice and snow yields tracer of preindustrial ozone

Using rare oxygen molecules trapped in air bubbles in old ice and snow, U.S. and French scientists have answered a long-standing question: How much have "bad" ozone levels increased since the start of the Industrial Revolution?

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