For some, it's not enough to explore space as a new scientific frontier. They want to own a piece of space as well. It's not just governments that are guilty of this. Wired has an interesting article about the history of some strange space-related legal cases where people have tried to stake claims to the moon, stars, and planets.
Life forms. You tiny little life forms. Where are you? Microscopic organisms are not to be overlooked in the search for extraterrestrial life. Microbes that survive the harshest of environments here on Earth may provide us with tantalizing clues as to what we may find on Mars, Europa, or elsewhere.