Nonsense of Noah

3. The Animals
The task of identifying all living species, collecting two or seven of each species, bringing them back to the Ark, and bringing a year's worth of their food, all the while feeding them enroute ... is impossible.

Just Curious: How did Noah know which species were clean before God imparted those laws to Moses? And if Noah knew about "clean" animals, why wasn't that knowledge passed down through the generations?