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Asteroid attack 2 - Where's the evidence? What Really Killed the Dinosaurs? BBC Science

Scientists believe a massive asteroid is the most likely explanation for the extinction of the dinosaurs. However, if an asteroid did wipe out all species of dinosaur there should be a 200 km crater somewhere on the planet. Scientists hunt for this asteroid evidence in this video from BBC show 'What Really Killed the Dinosaurs?'.
Length: 02:01

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