Director Roland Emmerich
is usually a stickler for realism (see: sending a computer virus via Macintosh to aliens in Independence Day
). So we hate to inform him that woolly mammoths were not, in fact, used to build pyramids. Heck, woolly mammoths weren't even found in the desert. They wouldn't need to be woolly if that were the case. And there weren't any pyramids in Egypt until 2,500 B.C or so.