Summary: Space dust and asteroid fragments reach Earth’s surface every day, but only rarely do extraterrestrial objects cause serious harm. In this podcast, MIT professor Richard Binzel evaluates the threat of asteroids and makes a case for how they might actually be useful to humans. Dr. Binzel’s talk, "Tracking Asteroids," from the Frontiers in Astrophysics lecture series, took place at the Hayden Planetarium on April 16, 2012.
