[Caipirabob]

This is why there are no major works of man older than that time anywhere that we know of.

I have also read that the estimated population of hominids around the end of the last ice age may have been below 10,000, possibly close to 6,000. That may be another reason there isn't much evidence of major works. The "light" nearly went out.

[muawiyah]

That "estimated number of hominids" is based on the evidence observed. I'm suggesting the evidence was, for the most part, destroyed!