Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

This video explores the fascinating reasons behind the physical properties of elements. It answers questions about why ...

Astronomers have finally watched a black hole do something Albert Einstein only described on paper: twist the very fabric of ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the ...

Contemporary physics has learned to describe the universe with unprecedented precision. Yet when it tries to say what time is, it stumbles again and ...

Engineers have found a way to shepherd microrobots with no wires, no radios, and no onboard computers. Instead, they steer them with light patterns designed using the same math physicists use to ...

Wormholes are one of science fiction’s favourite cheats. Need characters to cross impossible distances? Skip years of travel?

Ask the publishers to restore access to 500,000+ books. An icon used to represent a menu that can be toggled by interacting with this icon. A line drawing of the Internet Archive headquarters building ...

Capturing the first image of a supermassive black hole using the Event Horizon Telescope (EHT). This image of the black hole at the center of the nearby galaxy M87 reveals how gravitation affects the ...