The Universe is expanding, and the Hubble constant tells us how fast. But how can it be a constant if the expansion is accelerating?
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Since its observation discovery in the 1990s, dark energy has been one of science’s biggest mysteries. Could black holes be the cause?
It’s not about particle-antiparticle pairs falling into or escaping from a black hole. A deeper explanation alters our view of reality.
Nothing lives forever, at least, not in the physical Universe. But relativity allows us to get closer than ever, from one perspective.
The multiverse is an idea that has gained a lot of traction in popular culture. But what does science have to say about it?
Science cannot help us understand or describe first-person experience. Zen koans are a powerful form for helping us reach that description.
The quantum world — and its inherent uncertainty — defies our ability to describe it in words.
The first observational evidence showing the Universe is expanding is 100 years old now: in 2023. Here’s the story of its 100th anniversary.
Headlines have blared that quasar ticking confirms that time passed more slowly in the early Universe. That’s not how any of this works.
From the tiniest subatomic scales to the grandest cosmic ones, solving any of these puzzles could unlock our understanding of the Universe.
“It is healthy and normal to be afraid of death.”
No matter how good our measurement devices get, certain quantum properties always possess an inherent uncertainty. Can we figure out why?
Without wormholes, warp drive, or some type of new matter, energy, or physics, everyone is limited by the speed of light. Or are they?
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.
The concept of ‘relativistic mass’ has been around almost as long as relativity has. But is it a reasonable way to make sense of things?
Nature may not allow us full access to the weirdness of quantum mechanics.
Singularities frustrate our understanding. But behind every singularity in physics hides a secret door to a new understanding of the world.
Light carries with it the secrets of reality in ways we cannot completely understand.
A group of prominent scientists shares how research has changed them.
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.
Twin Health lets patients with diabetes see what’s happening inside their own body and can model each patient’s unique metabolism.
Our greatest tool for exploring the world inside atoms and molecules, and specifically electron transitions, just won 2023’s Nobel Prize.
The Universe didn’t begin with a bang, but with an inflationary “whoosh” that came before. Here are the biggest questions that still remain.
Tumor cells traverse many different types of fluids as they travel through the body.
Most of us only ever see a fraction of a full rainbow: an arc. But optically, a full rainbow makes a complete circle. Physics explains why.
All the things that surround and compose us didn’t always exist. But describing their origin depends on what ‘nothing’ means.
Successful alpha leadership is more about caring and healing than dog-eat-dog supremacy.
For every proton, there were over a billion others that annihilated away with an antimatter counterpart. So where did all that energy go?
There is nothing more important to science than its ability to prove ideas wrong.