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Empty space itself, the quantum vacuum, could be in either a true, stable state or a false, unstable state. Our fate depends on the answer.

Emotion dysregulation has been linked to unhealthy risk-taking, relationship challenges, and negative physical health outcomes.

Named "Phoenix," this AI-powered humanoid could be your next coworker.

If the evolution of the Universe is a movie, what happens when we rewind it all the way backward?

The difference between predictions and observations of the magnetic properties of muons suggests a mystery for the Standard Model.

We think of physical reality as what objectively exists, independent of any observer. But relativity and quantum physics say otherwise.

Dark energy is one of the biggest mysteries in all the Universe. Is there some way to avoid "having to live with it?"

The Universe is expanding, and the Hubble constant tells us how fast. But how can it be a constant if the expansion is accelerating?

A concept known as "wave-particle duality" famously applies to light. But it also applies to all matter — including you.

Einstein called his idea "abominable," but the world of physics came around to embracing the views of Georges Lemaître.

In the very early Universe, practically all particles were massless. Then the Higgs symmetry broke, and suddenly everything was different.

If nature were perfectly deterministic, atoms would almost instantly all collapse. Here's how Heisenberg uncertainty saves the atom.

Contrary to common experience, not everything needs a medium to travel through. Overcoming that assumption removes the need for an aether.

The second law of thermodynamics is an inviolable law of reality. Here's what everyone should know about closed, open, and isolated systems.

Singularities frustrate our understanding. But behind every singularity in physics hides a secret door to a new understanding of the world.

Travel half the distance to your destination, and there's always another half to go. Despite Zeno's Paradox, you always arrive right on time.

Unless you confront your theory with what's actually out there in the Universe, you're playing in the sandbox, not engaging in science.

From the tiniest subatomic scales to the grandest cosmic ones, solving any of these puzzles could unlock our understanding of the Universe.

Since its observation discovery in the 1990s, dark energy has been one of science's biggest mysteries. Could black holes be the cause?

If the Universe is expanding, and the expansion is accelerating, what does that tell us about the cause of the expanding Universe?

If our Universe were born a little differently, there wouldn't have been any planets, stars, galaxies, or chemically interesting reactions.

Scientists can make substantial progress without fully understanding exactly what they're doing.

The quantum world — and its inherent uncertainty — defies our ability to describe it in words.

The quantum world is one in which rules that are completely foreign to our everyday experience dictate bizarre behavior.

The science fiction dream of a traversable wormhole is no closer to reality, despite a quantum computer's suggestive simulation.

Philosophy can focus on some dull topics. Luckily, some thinkers have spent lots of time on the philosophy of sex

Science cannot help us understand or describe first-person experience. Zen koans are a powerful form for helping us reach that description.

The multiverse is an idea that has gained a lot of traction in popular culture. But what does science have to say about it?

There is nothing more important to science than its ability to prove ideas wrong.

Light carries with it the secrets of reality in ways we cannot completely understand.