I think that this is very cool. It's an exobiology web-magazine, sponsored by NASA, covering all aspects of exobiology at approximately a university undergraduate level, with free content that can be read online. http://www.astrobio.net/ It has large numbers of articles on the origins of life, life in extreme environments, solar system planetology, exoplanets, space missions, and more. Here's their articles on the origin and evolution of life. There are hundreds of these alone. http://www.astrobio.net/origin-and-evolution-of-life/ Here's Comparative Planetology http://www.astrobio.net/comparativeplanetology/ There's lots more where that came from. Check it out.