Time is relative, not absolute, as gravity and motion both cause time to dilate. Your head and feet, therefore, don’t age at the same rate.
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No matter how good our measurement devices get, certain quantum properties always possess an inherent uncertainty. Can we figure out why?
Symmetries aren’t just about folding or rotating a piece of paper, but have a profound array of applications when it comes to physics.
The evidence that the Universe is expanding is overwhelming. But how? By stretching the existing space, or by creating new space itself?
Glueballs are an unusual, unconfirmed Standard Model prediction, suggesting bound states of gluons alone exist. We just found our first one.
It’s not about particle-antiparticle pairs falling into or escaping from a black hole. A deeper explanation alters our view of reality.
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.
No matter how good our measurement devices get, certain quantum properties always possess an inherent uncertainty. Can we figure out why?
Taught in every introductory physics class for centuries, the parabola is only an imperfect approximation for the true path of a projectile.
If the evolution of the Universe is a movie, what happens when we rewind it all the way backward?
In the expanding Universe, different ways of measuring its rate give incompatible answers. Nobel Laureate Adam Riess explains what it means.
Philosophy can focus on some dull topics. Luckily, some thinkers have spent lots of time on the philosophy of sex
Contrary to common experience, not everything needs a medium to travel through. Overcoming that assumption removes the need for an aether.
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 mutual distance between well-separated galaxies increases with time as the Universe expands. What else expands, and what doesn’t?
Dark energy is one of the biggest mysteries in all the Universe. Is there some way to avoid “having to live with it?”
Einstein called his idea “abominable,” but the world of physics came around to embracing the views of Georges Lemaître.
Scientists can make substantial progress without fully understanding exactly what they’re doing.
The ultimate definition of trauma, explained by leading psychiatrist Bessel van der Kolk.
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If you bring too much mass or energy together in one location, you’ll inevitably create a black hole. So why didn’t the Big Bang become one?
Nothing lives forever, at least, not in the physical Universe. But relativity allows us to get closer than ever, from one perspective.
Twin Health lets patients with diabetes see what’s happening inside their own body and can model each patient’s unique metabolism.
The difference between predictions and observations of the magnetic properties of muons suggests a mystery for the Standard Model.
Researchers devise a record-breaking laser transmission that avoids atmospheric interference.
Here on Earth, we commonly use terms like weight (in pounds) and mass (in kilograms) as though they’re interchangeable. They’re not.
If our Universe were born a little differently, there wouldn’t have been any planets, stars, galaxies, or chemically interesting reactions.
Holograms preserve all of an object’s 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher dimensions?
We know the Universe is expanding, but scientists don’t agree on the rate. This is a legitimate problem.
The Universe didn’t begin with a bang, but with an inflationary “whoosh” that came before. Here are the biggest questions that still remain.
Almost 100 years ago, an asymmetric pathology led Dirac to postulate the positron. A similar pathology could lead us to supersymmetry.