Evidence for carbonate minerals has shown up on Mars in the eroded terrain of Nili Fossae. Formed in the presence of water, such areas might once have provided a suitable habitat for life. More at New Scientist.
Earthfiles investigative reporter Linda Moulton Howe discussed the unexplained lights coming from Ceres, new data about Saturn's moon Enceladus, and explanations for the mysterious rumbling booms and metallic sounds and their possible connection to changes in the Earth's core.
First hour guest, documentary filmmaker James Fox has an update on UFOs. He is continuing to work on his upcoming documentary/feature 701 with Tracey Torme, which explores the origins of the UFO phenomenon and the government suppression of evidence.