Asteroid Rate Jumped in Solar System's Past - Quanta Magazine
- Asteroid Rate Jumped in Solar System's Past Quanta Magazine
- Asteroid strikes 'increase threefold over last 300m years' The Guardian
- Number of asteroids pummelling Earth shoots up since age of dinosaurs The Independent
- Earth May Be in the Middle of a Giant Asteroid Spike, Billion-Year Survey Reveals Live Science
- Earth's meteor impact spiked long ago, but the bombardment may not be over National Geographic
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