Sun

A new study shows that poor air quality has reduced the amount of sunlight reaching China's solar installations, undermining the country's renewable energy efforts.

Five examples of what some researchers have observed and recorded in the past few decades.

Researchers link risky choices to unexpectedly positive circumstances, like sports wins and sunny days.

Although their ranks have diminished, the Flat Earth Society is alive, the planet is wrapped in an ice wall, and the sun and the moon are the exact same size.