Apophis. It's 390m wide. And it could hit Earth in 31 years.
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It's called Apophis. It's 390m wide. And it could hit Earth in 31 years' time - Click to read the article
In 2029, astronomers will know for sure if Apophis will pose a threat in 2036. If the worst-case scenarios turn out to be true and the Earth is not prepared, it will be too late.
Still, we have a long time to prepare for the worst case.