SpaceSaturn's largest moon was once a titanic snowball If Titan sometimes freezes over entirely, it would help to solve the moon's methane mystery, and a probe to Pluto may offer the first test of the idea News
SpacePlanet Bling: solar system's giants host megadiamonds Crushing temperatures and pressures in gas giant Saturn's interior could turn soot into immense 'diamondbergs' News