The most strange thing, according to the WT is that they accept the year of the bulding of Pyramids around 2500 B.C, so that is 100 years BEFORE THE GREAT FLOOD...So how can a world wide flood destroyed the globe and kept the Pyramids in perfect condition? Also if there was a world wide flood all the wood and papyrus would have been destroyed in Egypt, since papyrus is found and preserved there due to the dry and hot climate!!! And how come according to WT and the Old Testament Noah and 3 sons survived and in just of little time they Egypt became a huge nation? Not to mention the other nations around?
Do you wanna some more? If you read in Genesis Cain went to found his wife and moved to another city!! So how many children did have Adam and Eve had, in order to build a city? That means they were so sexually active that she must born every year at least 10 kids and again that is not enough to create the Sumerian and Egyptian civilazation!!!
The Genesis account cannot taken literaly in many ways, most of all due to the time table that supposed "humans"are created, plus the fossil record shows that Earth is billions of years old, with the appearance of homo sapiens the last 35-50,000 years...