Why aren't all black bears black?

Sometimes a name is just a name. Take bears, for example. In Yellowstone National Park, black bears outnumber their brownish-colored grizzly bear cousins, and in coastal areas of the Pacific Northwest, if someone says "brown ...

Protecting wildlife along the US-Mexico border

The border wall snaking along the US-Mexican border was built to keep migrants out—but conservationists say the towering metal barrier also stops wildlife from moving between natural habitats.

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