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Asteroid Day serves as a teachable moment

Today’s 112th anniversary of a close brush with a cosmic catastrophe serves as a teachable moment about the perils and prospects posed by near-Earth asteroids.

Asteroid Day is timed to commemorate a blast from space that occurred over a Siberian forest back on June 30, 1908. The explosion, thought to have been caused by the breakup of an asteroid or comet, wiped out millions of acres of trees — but because the area was so remote, the death toll was minimal.

Because of the Tunguska blast and more recent close calls, such as the 2013 Chelyabinsk meteor blast, the threat from above is being taken more seriously. And although a Seattle-area asteroid mining venture called Planetary Resources fizzled, experts say the idea of extracting resources from near-Earth asteroids is worth taking seriously as well.

Get the full story on GeekWire.

By Alan Boyle

Mastermind of Cosmic Log, contributing editor at GeekWire, author of "The Case for Pluto: How a Little Planet Made a Big Difference," president of the Council for the Advancement of Science Writing. Check out "About Alan Boyle" for more fun facts.

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