Major Space Missions Move Ahead In Search For Extraterrestrial Life

The European and US space agencies are moving ahead on their next major missions to explore the Solar System. Nasa has begun choosing a destination for a "flagship" robotic venture along the lines of Cassini-Huygens, which has been exploring Saturn and its moons. It is considering four targets: the Jupiter system, Jupiter's moon Europa, and Saturn's moons Enceladus and Titan.