Feb 22, 2013 (Talk of the Nation) — A week after a meteor exploded over Russia on the same day that an asteroid swung closely past Earth, experts discuss how the potential threats posed by near-Earth objects should be addressed. Astronomers Donald Yeomans and John Tonry weigh in on how to keep the planet safe.
This text will be replaced
Missing some content? Check the source: NPR
Copyright(c) 2013, NPR