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.

Into the wild: Animals the latest frontier in COVID fight

To administer this COVID test, Todd Kautz had to lie on his belly in the snow and worm his upper body into the narrow den of a hibernating black bear. Training a light on its snout, Kautz carefully slipped a long cotton swab ...

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