I was listening to NPR this morning and heard a NASA scientist say that the Curiosity rover may have made an exciting discovery. “This is going to be one for the history books,” he said. It will take weeks of poring over the data before his team will say anything. They want to be certain that the data is solid.
That leaves us to speculate. Is it a sock that matches the single one in my clothes drawer? The discovery comes from a chemical analyzer that has been doing tests on Martian sand. A few possibilities: