1:15Video · Cosmic Impacts and Planetary Defense
The Asteroid That Turned Air Into a Bomb
Tunguska flattened a forest without making a crater: the atmosphere became the weapon.
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Cosmic Impacts and Planetary Defense
Airbursts, comets, and the new ability to change an asteroid’s path.
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3:35Video · Cosmic Impacts and Planetary Defense
The Perseid Meteor Shower’s Deadly Secret
A beloved meteor shower is Earth crossing debris from a 26-kilometer comet.
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