Science

The service, launched last year, is currently available in some 400 cities in the United States. But the social media giant said it has found that 40 percent of Americans live in places where there weren't enough local news stories to support it.
Major companies aim to launch flying taxis in next decade
They're not quite here yet, but Uber and others are working on them and have set some bullish timelines. Flying taxis promise to ease traffic on the ground, but some worry they'll boost inequality.
How concerned should we be about climate change?
In September, the UN stated that climate change is the defining issue of our time and that global leaders have until 2020 to come up with solutions. In a recent New York Times op-ed, columnist David Wallace-Wells says it might be time to panic about climate change.