Reposting from the Open Thread:

From the Profit by "Kehlog Albran":

What lives longer? A Mayfly or a Cyprus tree?

If you answer a Mayfly then you are very perceptive: you realize that in time and space, time is relative and the short life of the Mayfly could be mysteriously longer than the life of the mighty Cyprus.

If you answered a Cyprus then you are unimaginative, but correct.