To find other life in our solar system, we may have to prospect for it.
Our destinations: Mars and Europa, one of Jupiters moons. Beneath
Europas crust, scientists believe, is an ocean of volcanically heated
mud -- just the kind of environment that can spawn primitive microbes.
The turbulence churning below is written across a veneer of ice.
Europas surface is rent with fractures. The spacecraft Galileo recently
sent back images of a zone, bulging with spill-over from the moon's
roiling interior. If life exists here, then who can doubt it also has
emerged in the universe beyond?