22 March 1991
Vol 251, Issue 5000

About The Cover

A syllable in signed languages. Identical language structure in signed and spoken languages provides clues to the biological foundations of language. A syllable similar to the one represented here was observed in deaf infants´ manual babbling. Similarities between manual babbling in deaf infants and vocal babbling in hearing infants reveal that babbling is determined by an amodal, brain-based language capacity. See page 1493. [Photograph by Robert Lamarche]