Well, that may be too strong, but going palm up still sounds like a potentially important piece of the puzzle of the evolution of primate communication. In today’s NY Times.
Palms Up … The Origin of Human Language?
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I´m also a fervient supporter of theories of visuo-gestural communication as the transition step in the evolutionary origins of spoken language.
Particularly, Adam Kendon´s book is outstanding.
Recently, M. Tomasello and Josep Call have publised a book on gestures in apes and disccus some evolutionary theories of language pointing to gesture as the bootstrap to spoken language.