Listened in on a sermon this weekend.  And, the preacher touched on  interesting points that I was not ‘deeply’ aware of.

Basically, he spoke about how the climate and ‘man’ changed so much after the flood.

Here is a chart that shows the dramatic change in longevity:

Why did man live longer BEFORE the flood

http://www.biblestudy.org/basicart/why-did-man-live-longer-before-flood-of-noah-than-after-it.html

References:

1. Why did man live longer before flood of Noah than after it
   Link
2. At what age did God create Adam
   Link