NASA Plays it Close to the Vest

Huh:

As Curiosity prepares for Thanksgiving on Mars, rover fans have been left hanging about a discovery from the Red Planet that a NASA official has billed as a big one.

Just you wait, NASA says.

Not everyone wants to. Curiosity’s Facebook page had one early-morning comment from a fan: “WHAT IS IT?!?!” Mars watchers were expressing the same sentiments on Twitter.

I think I might know what it is.