Nicely done site on human evolution from several perspectives. The main portions of this are an "interactive documentary" and a timeline. From the Institute of Human Origins.
A highly visual explanation of life's origins. Start with the Timeline, where you can select the time you want to explore. There are separate sections on the development of cells and RNA. From the Museum of Science in Boston.
A series of 12 videos--each 6-10 minutes--on evolutionary aspects of various biological topics ( anatomy, botany, etc.). From Virginia Commonwealth University.
The Encyclopedia of Life aims to increase awareness and understanding of living nature by gathering, generating and sharing knowledge in an open, freely accessible and trusted digital resource.