Kitt Peak National Observatory is celebrating 60 years of welcoming visitors to the moutnaintop collection of telescopes 55 ...

With hibernation right around the corner, the bears in the Greater Yellowstone Ecosystem are in full-on pig-out mode, eating ...

A “dwarf planet” discovered at the start of the 19th century has been mystifying scientists for hundreds of years. Now, ...

A new study reveals that the dwarf planet Ceres is much icier than previously thought, possibly harboring a subsurface ocean.

A junior at Eastlake High School, 16-year-old Grace Yihua Lee is one of 16 finalists from across the globe in the annual ...