NASA astronauts Butch Wilmore and Sunita Williams face potential long-term health issues after a nine-month space mission.

Astronauts returning to Earth, such as Sunita Williams and Butch Wilmore, face a range of unusual physiological side effects ...

The Milky Way's Central Molecular Zone (CMZ), is unlike most of the galaxy. Almost 80 percent of its dense gas is held there, packed into frigid clusters called molecular clouds. Gases churn through ...