The Martian is a movie that basically started life on Reddit, as a self-published novel by sci-fi writer Andy Weir about a manned mission to Mars that goes horribly wrong. It's now a massive Hollywood blockbuster, and the first official trailer for the film is finally out.
The printed-word iteration of The Martian is interesting purely because it deals with the hard science of space travel and alien worlds extremely well -- Weir has a background in computer science and is the son of a particle physicist, and spent the three years of writing the book mostly on maths calculations and scientific research. Here's hoping that the movie respects that, and hopefully we'll get a modern 2001: A Space Odyssey. [YouTube]