I saw that Discovery Channel program also. I wish that it had gotten into other aspects of the story of the Flood.
Looking at it now, it's really hard to swallow. Four men built a seaworthy vessel that was (according to what I looked up online) 450 feet long, 75 feet wide, and 45 feet tall, with three interior levels, stocked it with pairs (seven of some) of all animals and birds and enough food for all of them for 40 days.
Riiiiiiiiiight.
Mike.