Courtesy of NASA.
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Are asteroids more scarey just because you can't see them? |
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With over 200million Near Earth Asteroids (NEA), what is the risk of it happening again?
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An
asteroid like this one hit the earth 65 million years ago. It
wiped out the dinosaurs.
| Risk
The risk of an asteroid destroying the earth depends on two things: its size and the chance of it hitting. The hazard of an asteroid impact is the possible destruction it could cause. This has been categorised according to the asteroids size. The probability of an impact depends on the number of near earth asteroids of a particular size. Click onto the next page to see how the risk to life on earth is assessed. |