Man is not 70,000 years old. That's when the diaspora out of Africa began, so there were no modern humans (H. sapiens) in Asia before then. Africa was full of modern humans for perhaps hundreds of thousands of years (but not millions) before that and other now-extinct H. species existed on other continents. The first creatures classified as genus Homo go back about three million years and lived in Africa. Accepting your assertion for the sake of argument, that was not a human civilization. Apes did not exist at all until about thirty million years ago. The first primates did not appear until around sixty million years ago, long after the demise of the dinosaurs.