Piece of ice in river forms perfect circle

It looks like a big piece of ice started spinning in a river current. As it rotated, irregular chunks broke off until it formed a circle.

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  1. Not math - fairies.

  2. Pinky, are you thinking what I'm thinking?
    I think so Brain, but where are we going to get a needle and record big enough at this time of night?

  3. IRobot says:

    I'm not saying that its aliens.... but its aliens.

  4. Nah, it's a fella named eddy. He comes on turbulent at first, but he's a swirl guy if you give him a chance.

    Dear diary, today fluid dynamics saved me from a Signs sequel. Today was a good day.

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