Smithsonian Magazine on MSN

From a Remote Observatory, He’s Defending Our Planet. Get a Glimpse Inside the Life of a Doomsday Asteroid Hunter

David Rankin of the Catalina Sky Survey in Arizona spends nights scanning the solar system for potentially catastrophic space ...
Washingtonian

Inside NASA’s Mission to Defend Earth From Deadly Asteroids

Our Solar System contains tens of thousands of potentially dangerous asteroids that could wipe out an entire city, or worse.