An interesting article in the Arizona Daily Star:  http://azstarnet.com/article_61f99ebf-1d83-51ee-a010-75d9a036d002.html   The article describes a study that indicates ancient man interbred with other, now extinct, human species.   It got me thinking about how developed the ideas and language of the various human species were.  Was there effective cross-species communication?  Did the interbreed…