Having a 'moon face' can be a sign of Cushing syndrome, but that's typically not the only symptom. Here's what experts want ...

Blood Falls in Antarctica flows unpredictably with iron-rich, salty water. Microbes inside survive without sunlight.

The lunar heart, created by the interplay of light and shadow, is visible once a month, just before our satellite reaches ...

February's full Snow Moon will have a royal companion as it rises alongside Regulus, a star nicknamed "Heart of the Lion", ...