A lazy day during which we do absolutely nothing sounds heavenly, but how much unstructured time can we comfortably abide?

Federal forecasters broke down the most likely scenarios around the United States this week.

The conflict over compulsory service for the nation’s ultra-Orthodox has become a stand-in for a larger struggle over the country’s right-wing, religious turn — and could determine its future.

The growing availability of low-cost air quality sensors is helping people across the world track air pollution.

The postwar generation had a good run. Now we’re all paying for it.