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 ...

Videos in this batch show unidentified aerial phenomena but offer few clues to existence of alien life Sign up for the Breaking News US newsletter email The Pentagon on Friday released a second ...

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 ...

In the early 20th century, nothing quite fit — fire hoses couldn't connect to one another, football teams played with different balls, traffic lights meant different things in different states. Then ...

The Earth has innumerable wonders, both natural and constructed, but a handful of them are so immense or so special in design they can be seen from space. These wonders include ancient structures and ...

A tiny screw. A precise angle. How America built a hidden empire, one standard at a time.

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 ...