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Most fundamental constants could be a little larger or smaller, and our Universe would still be similar. But not the mass of the electron.

The observation that everything we know is made out of matter and not antimatter is one of nature’s greatest puzzles. Will we ever solve it?

Behind America’s hunt for a superior semiconductor.

The robot can drive heavy steal beams into the ground at a rate of 1 per 73 seconds, which will help expedite solar farm construction.

The closest known star that will soon undergo a core-collapse supernova is Betelgeuse, just 640 light-years away. Here’s what we’ll observe.

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.

The lithium-ion alternatives could help create a safer, greener future.

It would get rid of our hazardous, radioactive, and pollutive waste for good, but physics tells us it’s a losing strategy for elimination.

You are an energy field — but not the “chakras” or “auras” kind.

IceCube scientists have detected high-energy tau neutrinos from deep space, suggesting that neutrino transformations occur not only in lab experiments but also over cosmic distances.

The electromagnetic force can be attractive, repulsive, or “bendy,” but is always mediated by the photon. How does one particle do it all?

The mass that gravitates and the mass that resists motion are, somehow, the same mass. But even Einstein didn’t know why this is so.

Scientific surprises, driven by experiment, are often how science advances. But more often than not, they’re just bad science.

In the 20th century, many options abounded as to our cosmic origins. Today, only the Big Bang survives, thanks to this critical evidence.

Our thermodynamic arrow of time explains why the entropy of any isolated system always increases. But it can’t explain what we perceive.

There are some 26 fundamental constants in nature, and their values enable our Universe to exist as it does. But where do they come from?

In general relativity, matter and energy curve spacetime, which we experience as gravity. Why can’t there be an “antigravity” force?

Perhaps no existential question looms larger than that of our ultimate cosmic origins. At long last, science has provided the answers.

McDermitt Caldera, the site of an ancient volcanic eruption, straddles the border of Oregon and Nevada.

It’s not about particle-antiparticle pairs falling into or escaping from a black hole. A deeper explanation alters our view of reality.

Dark matter’s hallmark is that it gravitates, but shows no sign of interacting under any other force. Does that mean we’ll never detect it?

Quantum mechanics has taught us that even empty space contains energy. “Negative energy” is the state of having less energy than empty space.

First discovered in the mid-1960s, no cosmic signal has taught us more about the Universe, or spurred more controversy, than the CMB.

“The very same time that’s making you anxious is actually your most valuable asset. You can always create more energy and more money—but you can never create more time.”

In the expanding Universe, different ways of measuring its rate give incompatible answers. Nobel Laureate Adam Riess explains what it means.

Philosopher and author Christopher DiCarlo outlines the key areas where AI continues to reshape the labor landscape.

Traveling back in time is a staple of science fiction movies. But according to Einstein, it’s a physical possibility that’s truly allowed.

Energy balance is the greatest arbiter of weight gain. Embrace the “oinker diet.”

On larger and larger scales, many of the same structures we see at small ones repeat themselves. Do we live in a fractal Universe?

There are a wide variety of theoretical studies that call our Standard Model of cosmology into question. Here’s what they really mean.