Debris: friend or foe? Both!
February 19, 2013 The eye-popping, ear-splitting meteor streaking over Russia last Friday was an invitation to look up more often, to track the shooting stars we might see on any given night. These daily visitors to our planet put cosmic history into context, lighting up a past that is full of debris.
NASA says an impact with a 500-km-diameter asteroid would effectively sterilize the planet.
May 16, 2012 The violent demise of the dinosaurs can teach us a lesson or two about our place in the big scheme of things. Are we the end product of cosmic cataclysms?
NPR thanks our sponsors
Become an NPR sponsor