Headphones, AI and the future of humanity

New wireless Bluetooth headphones from Seattle startup Human are getting mixed reviews based on their appearance, and their initial starting price of $399 (which the company quickly dropped to a promotional price of $259). But their unique design, which completely envelops both ears, reflects a vision of the future in which technology will be melded to our bodies, and potentially to our minds. 

Plus: Jeff Bezos' first Amazon job ad, 25 years later; A new Netflix documentary will go inside the mind of Bill Gates, and Alexa makes a "Jeopardy!" cameo.