NASA's Cassini spacecraft has detected hydrogen molecules in the geysers shooting off the moon Enceladus, possibly the result of deep-sea chemical reactions between water and rock that could spark microbial life.
Chris Glein joins Tim to talk about Saturn and Juper's Moon.
Chris is a co-author on the new paper about Cassini's finding of hydrogen in the plume of Enceladus. He's a Cassini INMS team associate at Southwest Research Institute in San Antonio.