how did human history begin?

Here are some very interesting sites on the beginning of human history.

http://news.nationalgeographic.com/news/2001/07/0712_ethiopianbones.html
http://www.sciencedaily.com/news/fossils_ruins/early_humans/
http://www.eg-ban.com/
http://en.wikipedia.org/wiki/History_of_the_world