What would happen if an asteroid bigger than the Eiffel Tower hit Earth?
An asteroid this size would strike with a massive explosion, killing millions if it was in a city like London (Picture: Nasa/Getty)
If you were outside just before the strike, you might see a trail of light in the sky moving closer for a few seconds to a minute.
By that point, it would be too late to do anything like move to safety. It would be your messenger of the cosmic explosion about to hit, vaporising you and your whole city with the power of dozens of nuclear bombs.
This...
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