Clownfish rely on darkness to hatch. Human lights are stealing it away. (Credit: patrik johnson/Shutterstock)

From space, the picture is crystal clear. Across the globe, cities twinkle with artificial light against the night sky. And the nocturnal expanse is only getting brighter. Scientists estimate the amount of artificial light at night grows by more than two percent every year. The nighttime glow carries detrimental consequences for human health and disrupts animal behaviors like migrati