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io9 - Jul 16, 2008
For a while there in 2004, the newly-discovered asteroid 99942 Apophis looked like it had Earth's number. Then scientists crunched some numbers, and the odds of a terrestrial bullseye dropped to 1 in 45,000, where they …
Also tagged: nasa, asteroid, gravity tractor, near earth objects, wiley coyote, 99942 apophis, rusty schweickart