https://medium.com/financial-times/amazon-bones-up-on-history-with-eye-on-smart-glasses-8906dec1e725 >By Tim Bradshaw As Amazon joins the race to the face, its new “smart glasses” are powered by an old technology — bone conduction. >Sign up for Medium to read this story.This story is locked exclusively for members. But with a free Medium account, you can access this post, plus two other exclusive stories this month.Continue with FacebookContinue with GoogleAlready have an account? Sign in.Show your supportClapping shows how much you appreciated The Financial Times’s story.