Let the Odyssey begin! That is the theme underscoring the excitement shared by scientists analyzing new data relayed from the Mars Odyssey spacecraft as it orbits the red planet. However, Mars Odyssey investigators remain tight-lipped about what the spacecraft is seeing, offering only subtle hints regarding the probe’s scientific sleuthing. Early findings from NASA’s Mars Odyssey are to be detailed Friday at a science briefing, held at the Jet Propulsion Laboratory (JPL) in Pasadena, California.