Mystery on the Mall, Round 2

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OK sports fans. It's time to play another round of Guess What This Picture Is!

We're convinced you'll never guess. But go ahead, take a shot. Animal, Vegetable or Mineral? Is it a close-up of grandma's handbag? Skin from an overcooked Thanksgiving turkey? Or some reptilian remnant?

Here's a hint: It is one of the Smithsonian's 137 million artifacts.