NASA's Curiosity rover on Mars is busily grinding out science data — and has likely relayed some provocative findings — but mum's the word from scientists on the mission.

At the epicenter of all the speculation is that Curiosity's Sample Analysis at Mars (SAM) instrument has gulped in Martian soil and regurgitated exciting news.

John Grotzinger, lead mission investigator for the Curiosity rover, set the rumors in motion during an interview with NPR last week, saying, "We're getting data from SAM … this data is gonna be one for the history books. It's looking really good."