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Can we avoid becoming ‘dinosaur toast’? Asteroid hunter and former NASA astronaut Edward Lu. Photo © aspeninstitute-internal

Duration: 01:28

There are about a million sizeable asteroids, each capable of wiping out a big city.

Available since: Thu 4 Jul 2013

This clip is from

The Forum Peering into Space at Aspen Ideas Festival

Cutting-edge space science, including asteroids, dark matter and how to detect tiny units

First broadcast: 06 Jul 2013

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