A grey wolf prowls through Yellowstone National Park near Mammoth Hot Springs in Montana. A group of 66 wolves was reintroduced to Idaho and Yellowstone in the late 1990s. They now total 2,800 ...
If you liked this story, share it with other people. The forests of northern Europe provided Tim Christophersen with his first education. As a child in rural Germany he followed his grandfather, a ...
A formula can be used to predict what happens when a new species is introduced into an ecosystem -- whether it will establish itself in the community or fail to gain a foothold and die out. When a new ...
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