Darwin Online

I'm a part time science buff, by which I mean I enjoy science but don't always have bandwidth to stay up on science news. However, present work necessarily builds on the past and it's always a pleasure to spend time looking back at the history of science. I recently discovered this very cool repository of the complete works of Charles Darwin. It's humbling to realize the number of fundamental insights that Darwin was able to decipher from this observations: he was truly one of history's great geniuses. Nature recently ran a wonderful story on Darwin's key contributions to current scientific understanding, though it unfortunately requires a subscription.