Asteroids have wiped out life on Earth before - what are the chances of another hit any time soon ?
In a comment certain to elicit a certain degree of trepidation, NASA administrator Charles Bolden remarked at a hearing on Tuesday that if an asteroid was on it's way with only a few weeks notice then the only thing that anyone could do was 'pray'.
"The odds of a near-Earth object strike causing massive casualties and destruction of infrastructure are very small, but the potential consequences of such an event are so large it makes sense to take the risk seriously," he said. "From the information we have, we don't know of an asteroid that will threaten the population of the United States, but if it's coming in three weeks, pray."
"Mr Bolden told US lawmakers that prayer was all that the US or anyone could currently do about unknown asteroids and meteors that may be on a collision course with Earth."
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