Putting the science in science-fiction can be trickier than it seems, just ask Mike Cahill and Brit Marling, co-writers of the Sloan Prize-winning film Another Earth. The film follows Rhoda Williams, a young woman who killed a mother and child in a drunk-driving accident, which derails her plans to attend MIT and study astrophysics. Sentenced to four years in prison, she befriends John, the husband and father of the people she killed after her release.