SpaceAstrophile: Europa's choppy ocean looks friendly to life Chaotic dark scars on the icy surface of Jupiter's moon may be a sign of vigorous currents in the ocean below, which could help sustain life News
LifeAlien megaprojects: The hunt has begun With scans for alien radio signals drawing a blank, three teams are now searching for signs of extraterrestrial engineering, as Stephen Battersby reports Features