You are invited to celebrate Dr. Willie Ratcliff's 93rd birthday - then stay for a brainstorming session on how we can keep ...

For the first time, astronomers have directly measured a solar-system-size corona around a distant supermassive black hole, thanks to a rare cosmic alignment.

Virginia Allen was just 16 years old when she joined the nursing staff at Sea View Hospital in New York City, a facility that opened specifically to address the millions dying of tuberculosis, also ...