When Did We Become Human?

There's an article out today on NPR with the above title. It's written by a woman who teaches Biological Anthropology and she brings up the idea that this is never an easy question to answer. And it seems that as we discover more, it becomes more difficult to answer rather than easier. Here's a link to the article for your viewing pleasure:

http://www.npr.org/blogs/13.7/2012/09/11/160934187/for-how-long-have-we-been-human

Have fun!