Amazon is launching a paid streaming music service, the latest entry in an increasingly crowded field. Amazon Music Unlimited is being positioned to compete against existing services such as Spotify and Apple Music. It will cost 8 per month, or 80 a year, for members of Amazon's 99-a-year Prime loyalty program. Non-Prime members will pay 10 a month, the same monthly fee charged by Spotify and Apple Music. Owners of Amazon's Echo smart speaker, meanwhile, will be able to get the unlimited music service on one device for 4 per month.

When technologists meet up to talk about driverless cars, they get all dewey-eyed about the wonders ahead: A dramatic reduction in traffic deaths. Time saved, more convenience, less stress. But Paul Saffo, the California futurist, told attendees at a car technology conference in Mountain View on Monday that, like with any new technology, there will be bad stuff too. When you don't need to drive, you don't even need windows. And some driverless car prototypes, he noted, don't have them.