Cassini Saw Methane in Enceladus' Plumes. Scientists Don't Know How it Could be There Without Life

Even though the Cassini mission at Saturn ended nearly four years ago, data from the spacecraft still keeps scientists busy. And the latest research using Cassini's wealth of data might be the most enticing yet. Researchers say they've detected methane in the plumes of Saturn's icy moon Enceladus. The process for how the methane is …