The Washington Post, December 26th, 1995
Imagine a skater pirouetting on the ice. At first she turns slowly, her arms outstretched. Gradually, as she pulls her arms closer to her body, she rotates faster and faster until she becomes a dervish-like blur. The crowd roars. "The Earth is a little like that," said Donald B. Sullivan, chief of the Time and Frequency Division of the National Institute of Standards and Technology. "There are some geophysical factors that affect the rotation rate." Like the liquid core sloshing around, the size of the polar ice caps, the weather over the South Pacific, wind howling across the Great Plains. Fo...
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