Back in 1988, Francis Halzen had what he called a "cute idea." His vision grew into the IceCube observatory, and earns the 2026 Nobel Prize.

Strong, durable Martian concrete needs a mix of small-grained Martian sand and pure sulfur. NASA found the ingredients are already there.

From base to tip, Mars's Olympus Mons is the highest known mountain in the Solar System. Evidence suggests a higher one could be out there.

From Hawking radiation, even black holes are expected to eventually decay. Do they ever reach a point where we'll see what's inside of them?

Are quantum fields real, or a mere calculational tool? 3 unique experiments show they carry energy. If energy's real, so are quantum fields.

Making more complicated, more precise predictive calculations tells us what real experiments should deliver. AI just surpassed humans at it.

The expanding Universe, CMB, and large-scale structure revealed the Big Bang. New nucleosynthesis advances deliver unprecedented precision.

The observable Universe is 92 billion light-years in diameter. These pictures put just how large that is in perspective.

We strongly suspect we aren't alone in the Universe, but so far, we haven't found anyone. What determines when we'll finally make contact?

Most time travel stories involve changing the past to create a better future. Donnie Darko subverts that expectation, and a whole lot more.

Predicted back in the 1960s, 2012's discovery of the Higgs boson completed the Standard Model. But the biggest Higgs puzzle still persists.

Although many of Einstein's papers revolutionized physics, there's one Einsteinian advance, generally, that towers over all the rest.

Millisecond pulsars are the Universe's most accurate natural clocks. A pulse change, thought rare, just occurred twice in the closest one.

Millisecond pulsars are the Universe's most accurate natural clocks. A pulse change, thought rare, just occurred twice in the closest one.

From a primordial soup of particles, atoms eventually emerged. What happened to make it so, and could things have worked out any other way?

All matter particles can act as waves, and massless light waves show particle-like behavior. Can gravitational waves also be particle-like?

The matter that creates black holes won't be what comes out when they evaporate. Will the black hole information paradox ever be solved?

In 1982, an experiment showed unprecedented evidence for exotic matter: magnetic monopoles. But without reproducibility, it didn't hold up.

Emily Levesque (University of Washington) has been named the next Editor in Chief of the prestigious suite of AAS journals, beginning her term in August 2027.

The evidence that the Universe is expanding is overwhelming. But how? By stretching the existing space, or by creating new space itself?

We experience time as real. But what if it's only an illusion: an illusion that's inherently relative? Does time fundamentally even exist?

There's a speed limit to the Universe: the speed of light in a vacuum. But you can beat the speed of light. Just travel through a medium!

These real inventions and technologies take cues from what the “Star Trek” franchise imagined onscreen.

Generations ago, cosmologists asserted that the Universe might not just be the same in all directions, but at all times. But is that true?

Today's Milky Way only forms stars slowly. Our galactic center, where the star-forming rate is highest, gives a unique window into our past.

If you look into a mirror, you'll notice that left-and-right are reversed, but up-and-down is preserved. The reason isn't what you think.

We live in a four-dimensional Universe, where matter and energy curve the fabric of spacetime. But time sure is different from space!

The inside of every black hole leads to the birth of a new Universe. Could our Universe have arisen from one?

Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we're actually anything but average.

Our Big Bang could be just one region within an infinite, inflating multiverse. If we were born close to the cosmic edge, what would we see?

The double-slit experiment, hundreds of years after it was first performed, still holds the key mystery at the heart of quantum physics.

The sky and oceans are both blue. It's not because one reflects the other. Science explains them both, but for very different reasons.

There are two rival ideas to try and make sense of the Universe: dark matter or modified gravity. Can a new cosmic test settle the issue?

YouTube video by Ethan Siegel

The newest find recovers the earliest merger in galactic history: just 2 billion years after the Big Bang. Here’s what we know today.

Recent evidence could indicate the Universe doesn't expand evenly. Does that change our expected fate: Big Rip, Big Crunch, or Heat Death?

1859's Carrington event gave us a preview of how catastrophic the Sun could be for humanity. But it could get even worse than we imagined.

Time isn't the same for everyone, even on Earth. Flying around the world gave Einstein the ultimate test. No one is immune from relativity.