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NASA has warned that a huge asteroid twice bigger than Big Ben could crash on Earth.
The asteroid, called 2018 LF16, is expected to have a potential impact on our planet on August 8, 2023.
Fortunately, the chances of this happening are very small. NASA predicted a 99.9999967 percent probability of failure.
The Asteroid 2018 LF16 is approximately 213 meters wide, about twice the size of London's Big Ben clock tower, or the same size as the San Francisco Golden Gate Bridge.
Although the chances of the asteroid crashing on Earth are small, if this is the case, widespread destruction could result.
An object of this size would have an impact force of 50 megatons – the equivalent of the Tsar Bomba nuclear device.
The European Space Agency explained: "Some asteroids are very large and would cause enormous destruction if they hit the Earth, but their estimated population in our solar system is rather small and more than 90% of them would have been discovered. None of these presents any risk of impact.
"Some are very small (less than 10 m in diameter) and only a tiny fraction of the estimated population has been discovered, but any impact would be safe.
"The main challenge comes from the population of medium-sized objects, ranging from a few tens to several hundred meters in diameter."
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