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Signals from across the universe point toward a fascinating possibility.

The information we have in the Universe is finite and limited, but our curiosity and wonder is forever insatiable. And always will be.

Some constants, like the speed of light, exist with no underlying explanation. How many "fundamental constants" does our Universe require?

Does it have a deeper significance — or is it just a number?

Researchers devise a record-breaking laser transmission that avoids atmospheric interference.

A cute mathematical trick can "rescale" the Universe so that it isn't actually expanding. But can that "trick" survive all our cosmic tests?

For many years, cosmologists have claimed the Universe is 13.8 billion years old. A new paper says no, it's 26.7 billion. How do we decide?

Not even Einstein immediately knew the power of the equations he gave us.

When Einstein gave General Relativity to the world, he included an extraneous cosmological constant. How did his 'biggest blunder' occur?

No matter what physical system we consider, nature always obeys the same fundamental laws. Must it be this way, and if so, why?

Your sexual education was probably inadequate. Here’s the information you always needed.

The conservation of energy is one of the most fundamental laws governing our reality. But in the expanding Universe, that's just not true.

There is no such thing as a void in the Universe.

Michael Faraday's 1834 law of induction was the key experiment behind the eventual discovery of relativity. Einstein admitted it himself.

Explanations for the cosmic speed limit often conflate mass with inertia.

The ultimate definition of trauma, explained by leading psychiatrist Bessel van der Kolk.

There are two methods to measure the expansion rate of the Universe. The results do not agree with each other, and this is a big problem.

Holograms preserve all of an object's 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher dimensions?

It may be time for a cosmological paradigm shift.

Yes, dark energy is real. Yes, distant galaxies recede faster and faster as time goes on. But the expansion rate isn't accelerating at all.

We know the Universe is expanding, but scientists don't agree on the rate. This is a legitimate problem.

For many years, some cosmologists embraced the idea of an eternal, steady state universe. But science triumphed over philosophical prejudice.

How scientists found out that we live in a cosmic aquarium.

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.

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

The multiverse pushes beyond the limits of the scientific method. From our vantage point in the Universe, we cannot know if it's real.

When what we predict and what we measure don't add up, that's a sign there's something new to learn. Could it be a new fundamental force?

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.

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