Episode Clips

Do Dogs Love Us or do They Just Want Treats?

It's time to learn the truth once and for all.

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Polar Extremes

Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.

Animal Espionage

Camera technology is revolutionizing the study of animals—without them even noticing.

The Violence Paradox

Is violence actually declining? If so, why? And can we build a more peaceful future?

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