To hear this interview with Gaia Vince about her book, TRANSCENDENCE: How Humans Evolved Through Fire, Language, Beauty & Time,* click on this link: https://forthright.media/2020/04/01/gaia-vince-transcendence-how-humans-evolved-through-fire-language-beauty-time/
*It includes links to hear the whistle languages & other sites to articles referenced in the interview.