New find pushes age of stone tools back a million years

Hominins have been using stone tools for at least 3.4 million years, about 900,000 years longer than previously thought.

http://arstechnica.com/science/news/2010/08/new-find-pushes-age-of-stone-tools-back-a-million-years.ars?comments=1#comments-bar

Here's the article in Nature. Subscription required.
http://www.nature.com/nature/journal/v466/n7308/abs/nature09248.html