As before, sleep is another key focus of the device, although now with an added emphasis on your blood oxygenation levels. Essentially, when you're asleep, the watch will keep an eye on how much oxygen is pumping through your veins in case you're not getting enough. A lack of oxygen during sleep can be a…

Humans and mythical creatures struggle to live together peaceably in the wake of a devastating war as a brutal serial killer runs amok in Carnival Row, a new "Victorian neo-noir" fantasy series on Amazon Prime. It's part murder mystery, part fairy tale, and 100% wholly original, rather than being an adaptation of pre-existing source material.…

Once just the maker of humble streaming boxes, Roku is slowly spreading into every facet of the home theater experience. First came the Roku TV, with the streaming platform built into modestly priced 4K sets. Last year, the San Jose–based company got into the audio game, releasing a pair of wireless speakers. If that was…

America’s fleet of 480,000 school buses drives nearly 3.5 billion miles every year. These diesel buses emit millions of tons of greenhouse gases into the environment, contributing to climate change, and expose children to dangerous pollutants that can affect their health and academic performance. Replacing them with electric options could drastically reduce school transportation’s impact…

The financial world is buzzing with an arcane sounding issue—the inverted yield curve. Here’s what that means: The overwhelming majority of the time, the longer you want to borrow money for, the higher the interest rate. So a 30-year mortgage will typically carry a higher rate than a 15-year mortgage; that’s true of government bonds…

For half a year, Joe Hollier has been living without a phone. At least, without anything you'd recognize as a phone. He carries around a pocketable device, the color of graphite, that makes calls and sends text messages and does little else. To see it in his hand, or pressed up to his ear, looks…

Airline-booking software is the kind of back-office technology that seems like the last thing to attract the attention of antitrust regulators. But airlines complain that the US industry leader, Sabre, is opaque, frustrating, and sometimes slow-moving. So maybe it shouldn’t be a surprise that the US Department of Justice filed suit last month to prevent…

While Americans celebrated a long Labor Day weekend, millions of people in China enrolled in a giant experiment in the future of fake video. An app called Zao that can swap a person’s face into movie and TV clips, including from Game of Thrones, went viral on Apple’s Chinese app store. The app is popular…

Jason Dunion has been flying on “hurricane hunter” planes for the past 20 years to collect data on tropical storms. Yet Sunday’s flight into Hurricane Dorian was the first time he had felt the awesome power of a Category 5 storm.Dunion, a scientist at a National Oceanographic and Atmospheric Administration meteorology lab in Miami, was…

In October 2015, thousands of Uber employees took their seats at the Axis Theater in Las Vegas’ Planet Hollywood, where they were introduced to “Professor Kalanick”—Uber CEO Travis Kalanick, wearing a white lab coat and thick black glasses and standing in front of a rickety schoolhouse chalkboard on wheels. The employees were in Vegas for…