The history of cosmic ray research is a story of scientific adventure. For nearly a century, cosmic ray researchers have climbed mountains, soared in hot...
Astrophysicists are discovering new extrasolar planets—those outside our Solar System—almost daily. NASA's Spitzer Space Telescope (originally called SIRTF, or the Space Infrared Telescope Facility) and...
Brown dwarfs are cosmic objects that are intermediate between stars and planets. Scientists have spent more than a decade seeking confirmation of the coolest, faintest...
Gamma-ray bursts—flashes of intense radiation in space that are often just seconds long—were accidentally discovered in the 1960's by satellites built to monitor nuclear bomb...
When did modern humans make their first appearance in Europe? A jawbone excavated in England and two molars found in southern Italy suggest that modern...
Gravity may seem elementary. But proving Einstein's theories about it is quite hard. To do so, scientists are struggling to capture gravity's most elusive hallmark:...
