Science: Tongue Twisters

Can you roll up the edges of your tongue so that the tongue forms a sort of tube? If you can, you are a subject of interest to Researcher Alfred Henry Sturtevant of California Institute of Technology,* and to genetic science. If you can't, you are still pretty interesting.

Last week, in the dignified Proceedings of the august National Academy of Sciences, Researcher Sturtevant announced that he had examined 280 subjects, that his "positives" (tongue-rollers) outnumbered his negatives by about two to one.

A slightly higher percentage of women (67%) can do the trick than...

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