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Go behind the lens with the making of 'In Her Nature.'

Uncover the truth about a pervasive epidemic that threatens bighorn sheep.

Follow the devastating, yet heroic rescue and recovery stories from the Australia fires.

Explore the myths and misconceptions surrounding the widely misunderstood opossum.

Follow researcher Maggie Hirschauer as she learns about the monarchs in Montana.

In the otherworldly Spiny Forest of Madagascar, a historic release is about to take place.

You think your upstairs neighbors are noisy? You haven't met bush babies.

Lopez, who died Dec. 25, won the 1986 National Book Award for Arctic Dreams,an account of his travels in the far north over a period of four years. Originally broadcast in 1989 and 2013.

For Betsy Block and her family, picnics never turn out to be romantic meals eaten under cloudless skies. For them, a picnic is a state of mind -- and can take place on the front stoop, in the living room.

A National Institutes of Health conference reviews the latest research on menopause treatments. Many medical professionals question whether natural hormone replacement therapy is safe.