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Originally Posted by Dragar
I'll be dead by then so no biggy to me  |
well, you don't know it
chances of a big (1 mile / 1kilometer+) asteroid or comet hitting Earth in the 21st century are extremely small. Such events happen once every milion years or so...
BUT
Quote:
A near earth Object (NEO) does not need to be large to devastate. One the size of a small garage would annihilate a large city. One big enough to leave a 10km crater, still nowhere near the size of the biggest (there is a 300km crater on Earth), would have the destructive force of every one of the world's 10,000 nuclear warhead combined.
(...)
How often is Earth hit by an asteroid?
More frequently than you may think. An incident like Tunguska occurs approximately once per every hundred years. Smaller ones, but easily big enough to take out a large city, occur at least 3 times per century, for example Brazil in 1930. While most of the recent recorded impacts have happened in places that were barely inhabited, we won't always be that lucky. If the Tunguska event had happened over the city of New York it would have been nearly leveled.
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more info here
http://www.armageddononline.org/asteroid.php