We still have no idea why humans speak over 7,000 languages

We still have no idea why humans speak over 7,000 languages
Why is it that humans speak so many languages? And why are they so unevenly spread across the planet?

http://ift.tt/2tiPTtK July 20, 2017 at 05:30PM
via Digg http://ift.tt/2tiPTtK