Deep within Antarctica's frozen desert, a crimson secret is leaking from the ice—unveiling a two-million-year-old mystery ...

If you didn't catch the "blood moon" Sept. 7-8 from your backyard in the United States, there's a perfectly good explanation — it wasn't visible in North America. The moon took on a striking red color ...

Skywatchers across much of the world will soon get a dramatic show as a total lunar eclipse transforms the Moon into a deep ...