[jimtorr]

Sometimes I wonder if this is because it may contradict with biblical history.

No, quite the reverse. The Bible is one of the first sources a historian looks at when researching the ancient Middle East. For instance, the Assyrians were entirely lost to history out-side of the Bible until archeologists began finding their cities.

[eastforker]

To an extent.Biblical historytells us of Egypt to about 2000 BCE, thats when Abraham was there, but it tell us nothing about the 2-3 thousand years before that.Thats why I mentioned the Sumerians, I understand some of their written history goes back about 8000 years.