NASA to Announce Mars Mystery Solved Jet Propulsion Laboratory September 24, 2015 **Nature Geoscience has Embargoed Details until 8 a.m. PDT/11 a.m. EDT Sept. 28)** NASA will detail a major science finding from the agency's ongoing exploration of Mars during a news briefing at 8:30 a.m. PDT (11:30 a.m. EDT) on Monday, Sept. 28. The event will be broadcast live on NASA Television and the