Evolution (Biology)
History of evolutionary thought 
A wiki entry on the history of evolutionary thought starting with the romans, greeks and chinese and getting a boost from Charles Darwin with his book On the Origin of Species. "Charles Darwin's On the Origin of Species, published on 24 November 1859, is a work of scientific literature...
Introduction to Evolution by KhanAcademy
Salman Khan calls evolution one of the most misunderstood and contentious concepts in science. The best way past that, of course, is mutual understanding. Great walk-though of what evolution is and what it does.
