In 1971, astronaut David Scott stood on the lunar surface, holding a hammer and a feather, and in the vacuum of the moon, he ...

Quantum Gravity and General Relativity represent two foundational yet traditionally disparate pillars of modern physics. General Relativity, Einstein’s seminal theory, elegantly encapsulates ...

So far, the most accurate model describing gravity is still Einstein’s theory of general relativity. It states that gravity as we feel and observe it is a kind of side effect of the fabric of ...

The universe’s accelerating expansion has long puzzled physicists. For decades, dark energy, an unseen force thought to make ...

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

In this last part of our series on recently digitized books from the Wenner Collection, we are focusing on works that ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

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What exactly is … everything? What is space-time? At one extreme, you’ve got the weird rules of quantum physics that deal with subatomic particles. At the other extreme, you’ve got the vast expanses ...

There’s an adage coined by [Ian Betteridge] that any headline ending in a question mark can be answered by the word “No”.

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