Our galaxy is still reverberating from a strike by a small galaxy or massive dark matter structure.
A large asteroid that initially had scientists worried has only a small chance of striking the Earth in 2040, says NASA.
Scientists say they've found more evidence of a major impact by a comet or asteroid, some 13,000 years ago.
Ever wondered exactly what would happen if a massive meteorite hit the Earth? Princeton University scientists can show you.
The Secure World Foundation (SWF) has warned the UN that it may be too disorganised to avoid disaster in the event of a major meteorite strike.