Two recently observed black hole mergers, occurring just weeks apart in late 2024, have opened an extraordinary new window ...

Centuries before anyone pointed a telescope at the sky, Isaac Newton figured out how gravity works. He showed that any object ...

What is the purpose of light? How does light work? Why does light exist? This video explores the longstanding debate over ...

The theoretical physicist and best-selling author finds inspiration in politics and philosophy for rethinking space and time.

It's a plot device beloved by science fiction: our entire universe might be a simulation running on some advanced ...

The U.S. stock market continues to absorb its knocks, whether geopolitical, credit-linked or trade-induced, and sits at ...

Two Caltech historians associated with the Einstein Papers Project have gathered together what they consider to be the most important of Einstein's ...

New strategies may soon allow scientists to test dark energy theories within our own solar system, linking cosmic-scale physics to local observation. Science advances through a cycle of proposing ...

Theoretical physicist Alex Lupsasca is pushing for a space telescope to glimpse the thin ring of light that is thought to surround every black hole.

In the 10 years since the first detection of gravitational waves, we have detected hundreds of these waves produced by the ...

For the first time, scientists have detected two black hole mergers with spins so unusual they may reveal a new generation of ...

Most of the atomic clocks in the world - fewer than 500 in total - are housed at standards institutes and used to keep time ...