Astronomers witness first moments of planet formation as rock grains crystallize around distant star HOPS-315.

A young star 1,300 light-years away has given astronomers something they have dreamed about for decades: a freeze-frame of ...

Earth and the entire Milky Way galaxy might be sitting inside an enormous, mysterious void—a giant cosmic hole making our universe expand faster right here than anywhere else. This unusual idea, ...

Many "modern" inventions actually have precedents dating back more than 1000 years, to ancient Greek and Roman times.

Just after sunrise on June 7, my friend Caitlin and I stood in the rain in Prague's Old Town Square, soggy and exhausted in ...

Most beloved European cities have earned their fame for good reason - they truly do feel like they were plucked straight from ...

Each tick of the clock marks a second in a day, normally 86,400 of them. But on July 9, 2025, Earth completed its rotation 1.3 milliseconds faster than usual, making it at least the shortest day this ...

Atomic clocks and our computer networks are the new, far superior form of time measurement, but we’re forcing them to keep in sync with this older form of measurement,” remarks Dr. David Gozzard, an ...

While that tiny time difference is imperceptible to humans, it represents part of a broader pattern that has left scientists ...

Rubidium holdover clocks must be designed to operate autonomously for months or years without human intervention. However, its long-term stability is affected by component ageing and environmental ...

The Israeli and American Alarm Clocks A wake-up call is sounded in the latest reports on the extent of damage America meted out to Iran’s nuclear program. This satellite picture shows Iran's ...