Fascinating video shows impact if an asteroid hit planet Earth

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A video showing what it would look like if a city-destroying asteroid hit planet Earth has been released. And scarily, the chance of an asteroid striking our planet is actually higher than scientists previously believed, according to the California-based B612 Foundation. The non-profit group has released the video in the hopes that it will press home the idea that impacts are more common than we think. The visualisation rests on data from a global network that listens for nuclear weapons detonations, which between 2000 and 2013 detected 26 major explosions on Earth. None of these were caused by nuclear weapons, they were all the result of asteroid strikes. NASA already has a program in place that tracks asteroids larger than 1 km. An object of this size, roughly equivalent to a small mountain, would have global consequences if it struck Earth. Report by Claire Lomas.
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