Please use one of the following formats to cite this article in your essay, paper or report: APA. Robertson, Sally. (2019, August 05). New theory demystifies evolution of human imagination.

Well more than 100 distinct sign languages exist worldwide, with each having features that made it possible for researchers to create an evolutionary tree of their lineages.

Douglas and senior scientist Peter Wills applied the model to cephalopods (including octopuses, squids, cuttlefish, and vampire squids), as well as to the evolution of Indo-European languages, and ...