Have you ever noticed the story of the tower of Babel in Genesis 11, and how everyone spoke one language, and how the god of the bible worried that they would eventually build a tower that would reach all the way up to heaven, where he lives? No? Really, I'm serious, it's in Genesis 11, read it for yourselves.
I'm guessing the guy that wrote this one, allegedly Moses (as if!), either didn't remember that he also wrote the following verses just one chapter before--actually, I think someone else wrote the Babel story and didn't bother checking, or wasn't acquainted with what we now know as chapter 10: