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The laws of physics obey certain symmetries and defy others. It's theoretically tempting to add new ones, but reality doesn't agree.

Early relics and late-time objects give incompatible results for the expanding Universe. This independent anomaly intensifies the problem.

Two of the answers add a dimension to physics that doesn’t belong there. Maybe we could call it "astrotheology."

We need a hypothesis that accounts for both the fine-tuning of physics for life but also the arbitrariness and gratuitous suffering we find in the world.

If you said "with the Big Bang," congratulations: that was our best answer as of ~1979. Here's what we've learned in all the time since.

Frank Wilczek is celebrated for his investigations into the fundamental laws of nature that have transformed our understanding of the forces that govern our Universe. In this video, the MIT […]

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?

The hot Big Bang was an energetic, brilliantly luminous event. Today's Universe is alight with stars. But in between, the dark ages ruled.

Holograms preserve all of an object's 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher dimensions?

One study suggested that the "Methuselah Star" is older than the Universe itself.

At all distances, the Universe expands along our line-of-sight. But we can't measure side-to-side motions; could it be rotating as well?

Modern cosmology conjectures different possible fates for the Universe and thus for the end of time. Details depend on which model is right.

Perhaps the most remarkable fact about the Universe is simply that it, and everything in it, exists. But what's the reason why?

From the present day all the way to less than 400 million years after the Big Bang, we're seeing how the Universe grew up like never before.

With such a vast Universe and raw ingredients that seem to be everywhere, could it really be possible that humanity is truly alone?

Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we're actually anything but average.

“The more we understand ourselves and the universe, the more magnificent it is.”

When the Universe was first born, the ingredients necessary for life were nowhere to be found. Only our "lucky stars" enabled our existence.

We can reasonably say that we understand the history of the Universe within one-trillionth of a second after the Big Bang. That's not good enough.

Archaeologists can learn how societies lived by studying what they left behind when they died. Astronomers are doing much the same thing.

University College London professor Brian Klaas exposes the ugly truth about world leaders.

If the evolution of the Universe is a movie, what happens when we rewind it all the way backward?

The emergence of life in the universe is as certain as the emergence of matter, gravity, and the stars. Life is the universe developing a memory, and our chemical detection system could find it.

How do physicists solve a problem like entropy?

Neuroscientist and author Bobby Azarian explores the idea that the Universe is a self-organizing system that evolves and learns.

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?

Photons come in every wavelength you can imagine. But one particular quantum transition makes light at precisely 21 cm, and it's magical.

The question of why the Universe is the way it is is an ancient one, and none of the answers we have come up with are satisfying.

Is science close to explaining everything about our Universe? Physicist Sabine Hossenfelder reacts.

At their cores, stars can reach many millions or even billions of degrees. But even that doesn't touch the hottest of all.