Great reading! I would like to add that the development of a brain is another huge milestone. Somehow Hawking forgets to mention that. And the development of

Great reading! I would like to add that the development of a brain is another huge milestone. Somehow Hawking forgets to mention that. And the development of the computer and Internet is a big milestone in the external transmission period in my opinion. If you like this kind of reading, I recommend the book: http://www.amazon.com/Short-History-Nearly-Everything/dp/076790818X http://www.amazon.com/Short-History-Nearly-Everything/dp/076...