Asteroid threat-Planet Earth

Video streaming by http://www.allthingsscience.com/nI believe our future depends on how well we know this Cosmos in which we float like a mote of dust in the morning sky." --Carl Sagan/nAccording to NASA, a soccer field-sized asteroid came within a mere 75,000 miles of Earth in June, 2002. Missing us by less than one-third of the distance to the moon.