Biology can offer us unique clues to understand one of humanity's most profound and mysterious faculties, the ability to communicate through language. What are the universals of human language? What do we know about how the brain processes language? Is sign language different in any fundamental way from spoken language? What are the implications that roughly half of the approximately 7,000 languages on the planet are not being taught to children? Is our view of the world influenced by our language? Is a lost language a loss to humanity's ability to understand the world?

The link asks more questions and documents just over two hours of video material of Robert Sapolsky exploring the biology of language: