Almost half the stuff in orbit around Earth can be classified as space junk, and the problem is only going to get worse as launches and orbital infrastructure increase. Using data from the U.S. Space ...

Scientists have unlocked one of the biggest mysteries of quasars -- the brightest, most powerful objects in the Universe -- by discovering that they are ignited by galaxies colliding. Scientists have ...

From a single gold coin's journey through the centuries, to an ingenious screw that changed engineering, the extraordinary stories behind 100 of the most significant and intriguing artefacts in US ...

A spacecraft has carefully approached and imaged a large hunk of metal orbiting Earth — a step in tackling humanity's mounting space junk woes. The delicate space mission, undertaken by the Japanese ...

In 1876, Americans filled an iron safe with objects meant to tell their story — to be opened a century later. Roman Mars and historian Jill Lepore trace its long wait, from Reconstruction to Watergate ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

The scope of objects in Smithsonian collections is staggering—from ancient Chinese bronzes to the Star-Spangled Banner; from a 3.5 billion-year-old fossil to the Apollo lunar landing module; from the ...