Watching killer asteroids (Introduction)

by David Turell , Wednesday, January 23, 2013, 20:43 (4115 days ago)

We need to. Bruce Willis won't always be available:-http://blogs.scientificamerican.com/observations/2013/01/22/asteroid-hunter-gives-an-update-on-the-threat-of-near-earth-objects/?WT_mc_id=SA_DD_20130123