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Nature 409, 143 (11 January 2001) | doi:10.1038/35051683

100 and 50 Years ago

In investigating the causes of directions of various spirals, I discovered a certain law and order in the arrangement of the direction of the spiral in horns which will interest many of your readers. (1) That in the antelopes the right-hand spiral is on the left of the head, and the left-hand spiral on the right of the head (crossed).