UK Daily Mail 
July 28, 2010
A massive asteroid might crash into Earth in the year 2182, scientists have warned.
The asteroid, called 1999 RQ36, has a 1-in-1,000 chance of actually hitting the Earth, but half of that risk corresponds to a potential impact in the year 2182.
It was first discovered in 1999 and is more than 1,800 feet across. If an asteroid of this size hit the Earth it would cause widespread devastation and possible mass extinction.
And scientists say that any attempt to try and divert the asteroid and save the Earth will have to take place more than 100 years before it is due to hit to have any chance of success.