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Humans, when we consider space travel, recognize the need for gravity. Without our planet, is artificial or antigravity even possible?

Despite the Sun’s high core temperatures, atomic nuclei repel each other too strongly to fuse together. Good thing for quantum physics!

A recent paper in the journal Physical Review Letters claims to prove that a “kugelblitz” is not possible.

Only 5% of the Universe is made of normal “stuff” like we are. Could there be dark matter or dark energy life, or even aliens, out there?

The galactic center is home to the most powerful engine in the Milky Way: a supermassive black hole. How does its energy ultimately escape?

The standard picture of our Universe is that it’s dominated by dark matter and dark energy. But this alternative is also worth considering.

Einstein’s general relativity has reigned supreme as our theory of gravity for over a century. Could we reduce it back down to Newton’s law?

The term “zero-point energy” has at least two meanings, one that is innocuous and one that is a great deal sexier (and scammier).

LHC scientists just showed that spooky quantum entanglement applies to the highest-energy, shortest-lived particles of all: top quarks.

A new hypothesis accuses the simple sugar of wrecking energy metabolism.

The most common visual depictions of the history of the Universe show the Big Bang as a growing tube with an “ignition” point. Why is that?

In all the Universe, only a few particles are eternally stable. The photon, the quantum of light, has an infinite lifetime. Or does it?

The largest particle accelerator and collider ever built is the Large Hadron Collider at CERN. Why not go much, much bigger?

For centuries, even after we knew the Sun was a star like any other, we still didn’t know what it was made of. Cecilia Payne changed that.

What are dark matter and dark energy? The large-scale structure of the cosmos encodes them both, with ESA’s Euclid mission leading the way.

Gravitational waves are the last signatures that are emitted by merging black holes. What happens when these two phenomena meet in space?

If atoms are mostly empty space, then why can’t two objects made of atoms simply pass through each other? Quantum physics explains why.

Under extreme conditions, matter takes on properties that lead to remarkable, novel possibilities. Topological superconductors included.

The Universe changes remarkably over time, with some entities surviving and others simply decaying away. Is this cosmic evolution at work?

Figuring out the answer involved a prism, a pail of water, and a 50 year effort by the most famous father-son astronomer duo ever.

Experiments on suborbital rockets are revealing how to make a better iron furnace.

Photons come in every wavelength you can imagine. But one particular quantum transition makes light at precisely 21 cm, and it’s magical.

Often viewed as a purely theoretical, calculational tool only, direct observation of the Lamb Shift proved their very real existence.

Why hasn’t matter fallen apart over billions of years? The mystery might start with protons.

The US needs 28 million EV chargers by 2030. Here’s how it can get there.

Memory takes effort, and our brains know it.

If the electromagnetic and weak forces unify to make the electroweak force, maybe, at higher energies, something even grander happens?

25 years ago, our concordance picture of cosmology, also known as ΛCDM, came into focus. 25 years later, are we about to break that model?

The expanding Universe, in many ways, is the ultimate out-of-equilibrium system. After enough time passes, will we eventually get there?

CERN’s Large Hadron Collider is the most powerful particle accelerator ever. To go even further, we’ll have to overcome something big.