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Cosmology
For years and over three separate experiments, "lepton universality" appeared to violate the Standard Model. LHCb at last proved otherwise.
1hr 33mins
Everything you ever wanted to know about the Universe, explained by physicist Sean Carroll.
The very dust that blocks our view of the distant, luminous objects in the Universe is responsible for our entire existence.
9mins
What do physicists actually mean when they talk about the multiverse?
The most common element in the Universe, vital for forming new stars, is hydrogen. But there's a finite amount of it; what if we run out?
We thought the Big Bang started it all. Then we realized that something else came before, and it erased everything that existed prior.
The answer to this question is key to understanding why anything exists.
By studying the dwarf galaxy Wolf-Lundmark-Melotte ~3 million light-years away, JWST reveals the Universe's star-forming history firsthand.
We confidently state that the Universe is known to be 13.8 billion years old, with an uncertainty of just 1%. Here's how we know.
Every time our Universe cools below a critical threshold, we fall out of equilibrium. That's the best thing that ever happened to us.
The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?
It's rare that one single image packs so much beauty and science simultaneously. This Hubble view of a nearby star-forming region has both.
We're used to scientists telling us about the math and physics behind astronomical events. But what does studying space make us feel?
You are trapped in time. You never live in the world as it is but only as you experience it as it was.
Science is for everyone, even those possessing strongly held beliefs that seem to conflict with the best available evidence.
We know the Universe is expanding, but scientists don't agree on the rate. This is a legitimate problem.
Our understanding always will remain incomplete.
Early relics and late-time objects give incompatible results for the expanding Universe. This independent anomaly intensifies the problem.
Are you unhappy with how various events in your life turned out? Perhaps, in a parallel Universe, things worked out very differently.
The Universe gravitates so that normal matter and General Relativity alone can't explain it. Here's why dark matter beats modified gravity.
It's literally the one and only trick that separates top-notch physicists from crackpots, dropouts, and those who can't cut the mustard.
The Universe begins with negligible amounts of angular momentum, which is always conserved. So why do planets, stars, and galaxies all spin?
From the tiniest subatomic scales to the grandest cosmic ones, solving any of these puzzles could unlock our understanding of the Universe.
It's the very closest stars to us that hold the key to unlocking the possibilities for life in star systems all throughout the Universe.
In the 20th century, many options abounded as to our cosmic origins. Today, only the Big Bang survives, thanks to this critical evidence.
The Big Bang is commonly misunderstood, warping our understanding about the Universe's size and shape.
The theory is accurate within at least one part in a quadrillion.
The James Webb Space Telescope viewed Neptune, our Solar System's final planet, for the first time. Here's what we saw, and what it means.
You would think that with all our technology, like the James Webb Space Telescope, we would know how big the Universe is. But we don't.
At a fundamental level, only a few particles and forces govern all of reality. How do their combinations create human consciousness?