My turn to rant!
alot of people are thinking that the worlds going to end on 2012,let me put your mind at rest,ITS NOT.before the mayans used the long count calendar,they used the 52 yr old calendar,so it ran out of years and then they switched over to the calendar that we use today.So that kinda explains it,the mayans just went over to a new calendar.If they'd still be alive then they would prolly go over to a new one.
what else...O yeah!there was that Y2K thingy,2003 and many more
But we have an Ace in our sleves,Technology!we build massive weapons and other gizmos to prevent this,like a meteor fall.
About a meteor,Scientists have found the last "killer asteroid" mutch like the one that wiped out the dinasores,and they found out its destination to earth or NEAR earth is 2020,so no meteor will kill us