Big Big News From Mars?

The Curiosity team has discovered "something" on Mars that they consider "earthshaking". 

MSL Principle investigator John Grotzinger said this: “This data is gonna be one for the history books,” he said. “It’s looking really good.”

So what is it? Organic molecules? Methane? Evidence that liquid water is close to the surface of Mars?

We have no idea, but as soon as we know, you'll know.
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