An ark? No...none of us know what is going to happen in 2012, next month, next week or tomorrow. But with weather systems and the events of the world unfolding the way they are it would be wise of us to prepare for disaster and hope that we can survive for as long as possible.
Heavens No! What would that really achieve. Do we really know what is going to happen in 2012? Can anyone really foretell the future? I love Merlin Fraser's answer. Just leave the human beings off this time.