Search
General Relativity
Extremely precise atomic clocks are not just of theoretical interest; they could help detect impending volcanic eruptions or melting glaciers.
Look out at a distant object, and you're not seeing it as it is today. It's size, brightness, and actual distance are all different.
Singularities frustrate our understanding. But behind every singularity in physics hides a secret door to a new understanding of the world.
For some reason, the charges on the electron and proton are equal and opposite, and their numbers are equal, too. But why?
The idea of "absolute time" was our default for millennia. But time is relative, as gravity and motion both cause time to dilate.
For some reason, when we talk about the age of stars, galaxies, and the Universe, we use "years" to measure time. Can we do better?
To answer any physical question, you must ask the Universe itself. But what happens when the answers aren't around anymore?
Despite all that we've learned about the Universe, there remain unanswered, and possibly unanswerable, questions. Could "God" be the answer?
More than any other of Einstein's equations, E = mc² is the most recognizable to people. But what does it all mean?
Is the multiverse real? It's one of the hottest questions in all of theoretical physics. We invited two astrophysicists to join the debate.
Yes, the Universe is expanding, but you might wonder, "How fast is it expanding?"
There are an estimated two trillion galaxies within the observable Universe. Most are already unreachable, and the situation only gets worse.
It is time to give the Russian cosmologist the credit he deserves.
At a fundamental level, nobody knows whether gravity is truly quantum in nature. A novel experiment strongly hints that it is.
There are two fundamentally different ways of measuring the Universe's expansion. They disagree. "Early dark energy" might save us.
New technology is helping physicists move forward in the search for the Theory of Everything.
We know it couldn't have began from a singularity. So how small could it have been at the absolute minimum?
Astrophysicists once believed in a static Universe, containing only the Milky Way galaxy. Science definitively proved otherwise.
After more than two decades of precision measurements, we've now reached the "gold standard" for how the pieces don't fit.
The same (former) NASA engineer who previously claimed to violate Newton's laws is now claiming to have made a warp bubble. He didn't.
Even without the greatest individual scientist of all, every one of his great scientific advances would still have occurred. Eventually.
There are a few possible solutions to the problem of interstellar travel, but they largely remain within the realm of science fiction.
If it wasn’t a singularity, how small could it have been? Today, when you look out in any direction as far as the laws of physics allow us to see, the […]
When you mix science with speculation, you get speculation. But the underlying science is still real. Whenever you hear the phrase, “it’s just a theory,” it should trigger alarm bells in […]
The ‘final parsec problem’ is still a mystery for astronomers. When it comes to black holes in the Universe, we know there are at least two major types. There are […]
Even a small merger can trigger so much more than we realize. Practically every galaxy in the Universe has a supermassive black hole at their core. Ranging from millions to many […]
And, if we have one, how close are we to it? No matter which direction we look in, or how far away our telescopes and instruments are capable of seeing, the […]
And why, even at its faintest, it always outshines every other star and planet. If you’ve been looking to the west after sunset recently, you may have noticed that there’s one […]
All scientific theories, at some level, are wrong. That’s why consensus is so vital. There are two important and common words that, when used scientifically, have a very different meaning than […]
And either way, is energy or information conserved? When two things in the Universe that “always” occur meet one another, how do you know which one will win? Gravitational waves, […]