what year shall the huge asteriod hit earth & how big is it ?

Question: what year shall the huge asteriod hit earth & how big is it ?
- Keywords:
  asteriod,
  earth,
  future
Asked by omega to Bob, Katie, Nisha, Sallie, Vee on 25 Jun 2012. This question was also asked by arnoxlade10.
- Sallie Baxendale answered on 25 Jun 2012:
  
  Nobody knows that. There are loads of asteriods whizzing around space and they sometimes hit planets. There is lots of evidence that some pretty big asteroids have hit other planets in our solar system in the past and they have hit earth before too. Eventually we may get hit again, but no one yet knows when that will happen and how big the asteroid will be.
- Bob Bonwick answered on 25 Jun 2012:
  
  No idea sorry. But I hope I’m not around!
- Vee Mitchell answered on 25 Jun 2012:
  
  Who knows, I don’t tend to worry about stuff I can’t do anything about.

Question: what year shall the huge asteriod hit earth & how big is it ?