As of Tuesday, Sept. 16, the moon phase is Waning Crescent, and it is 28% lit up to us on Earth, according to NASA's Daily ...

Systemic lupus erythematosus is a clinically and immunologically heterogenous, systemic autoimmune disease characterized by ...

Scientists were expecting the Sun to reach historically low levels of activity. Instead, the Sun has bucked the trend and is ...

New genetic evidence uncovers repeated waves of dispersal and surprising diversity among North America’s Ice Age giants.