Perhaps ten thousand penguins turn their heads in unison watching the planes go by, and when the pilots turn around and fly back, the birds turn their heads in the opposite direction, like spectators at a slow-motion tennis match.
Then, the paper reports, "The pilots fly out to sea and directly back to the penguin colony and overfly it. Heads go up, up, up, and ten thousand penguins fall over gently onto their backs."
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