Science: As NASA gears up for next week’s landing of the Curiosity rover on Mars, Science magazine interviews John Grunsfeld, the head of NASA’s Science Mission Directorate. A former astronaut, Grunsfeld took on the post in January. Despite the bad press NASA has received in recent years because of the canceling of the space shuttle program, the budget woes of the James Webb Space Telescope ( JWST), and the decision to pull out of the European-led ExoMars program, Grunsfeld remains optimistic about the future of US space exploration. He says the JWST is back on track, and he’s currently soliciting ideas for a future Mars program that would fly in 2018.