Episode

Replay: Mass Extinctions

When it comes to mass extinctions, dinosaurs get all the press. But there were actually five mass extinctions of life in earth’s history and the one that wiped out tyrannosaurus …

Episode

Mass Extinction

When it comes to mass extinctions, dinosaurs get all the press. But there were actually five mass extinctions of life in earth’s history and the one that wiped out tyrannosaurus …

Episode

Replay: Mr. Black Sheep Has No Wool

For Virginia sheep farmers, wool has become a nuisance. A worldwide glut of the fiber has left them spending more money to shear their flocks than they’ll earn from selling …

Episode

Mr. Black Sheep Has No Wool

For Virginia sheep farmers, wool has become a nuisance. A worldwide glut of the fiber has left them spending more money to shear their flocks than they’ll earn from selling …

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