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?
Though ultimately incorrect, the ancient Greek philosophers blazed a conceptual trail for humankind to understand the nature of reality.
There's a quantum limit to how precisely anything can be measured. By squeezing light, LIGO has now surpassed all previous limitations.
Are you unhappy with how various events in your life turned out? Perhaps, in a parallel Universe, things worked out very differently.
In the quest to measure how antimatter falls, the possibility that it fell "up" provided hope for warp drive. Here's how it all fell apart.
Is LK-99 truly a room temperature superconductor? These 4 tests, none of which have yet been passed, will separate fact from fiction.
It is time to give the Russian cosmologist the credit he deserves.
From high school through the professional ranks, physicists never tire of Newton's second law.
The Universe isn't just expanding, the expansion is also accelerating. If that's true, how will the Milky Way and Andromeda eventually merge?
The anthropic principle has fascinating scientific uses, where the simple fact of our existence holds deep physical lessons. Don't abuse it!
Einstein's most famous equation is E = mc², which describes the rest mass energy inherent to particles. But motion matters for energy, too.
All of the matter and radiation we measure today originated in a hot Big Bang long ago. The Universe was never empty, not even before that.
Einstein's "happiest thought" led to General Relativity's formulation. Would a different profound insight have led us forever astray?
The laws of physics don't prefer matter over antimatter. So how can we be certain that distant stars & galaxies aren't made of antimatter?
"Imagination is more important than knowledge" is often taken to mean that your conceptions outweigh what's real. That's not what he said.
We thought the Big Bang started it all. Then we realized that something else came before, and it erased everything that existed prior.
There’s a lot left to understand, ponder, and investigate. And there always will be. For hundreds of thousands of years — nearly all of human history — we had no definitive answers to some of […]
A researcher explains a little-known niche within modern physics: animal collective behavior.
Atomic clocks keep time accurately to within 1 second every 33 billion years. Nuclear clocks could blow them all away.
In 1974, Stephen Hawking showed that even black holes don't live forever, but emit radiation and eventually evaporate. Here's how.
End of life patients face mental health challenges uniquely existential and spiritual in nature — but psychedelics are emerging as a possible solution to relieve the suffering.