Everyone knows bad air quality when they breathe it in, but how does it measure and compare across different capital cities?

In a sweeping new study of more than 13,000 urban areas worldwide, researchers have mapped air pollution levels and carbon dioxide emissions, providing comprehensive global analysis of urban ...

In a sweeping new study of more than 13,000 urban areas worldwide, researchers have mapped air pollution levels and carbon ...

Where will the failed Soviet spacecraft Kosmos 482 land when it crashes back to Earth in the coming week? Most major cities ...

The Happy City Index ranks 200 cities across 82 metrics that add up to a global happiness quotient—these cities made the cut.

Astronomers have predicted where a 500-kilogram section of the Soviet Kosmos 482 satellite could slam into Earth on May 10.