Readers’ photos celebrate sunrises and sunsets, when the light is the most pleasing. Fifty-one photos were sent in; here are ...

Ansar Lemon, an engineering PhD student at Harvard University, says the team modeled how the brightness and color of the sky at the poles changed with the injection of sulfate, calcium carbonate, and ...

Florida is filled with gorgeous oceanfront locales and beaches where the sunset is particularly gorgeous, but there's no where like Key West for taking in the big show.