You should watch out for this one,
Apophis April 13, 2029. Not to be captain bringdown, here is Neil deGrasse Tyson talking about this event in our not too distant future.
[youtube]http://www.youtube.com/watch?v=vjdxuT8zhk0[/youtube]
Here he is again on the topic of this thread.
[youtube]http://www.youtube.com/watch?v=9ldflrUD4qQ[/youtube]
I really like listening to him...he seems like a stand up guy!