Humankind's greatest--and last--adventure! Possible signs of organic life have been found on Titan, Saturn's largest moon. A group of visionaries led by NASA's Paula Benacerraf plan a daring one-way mission that will cost them everything. Taking nearly a decade, the billion-mile voyage includes a "slingshot" transit of Venus, a catastrophic solar storm, and a constant struggle to keep the ship and crew functioning. But it is on the icy surface of...