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The hunt for the elusive particles continues.

A wave of innovation is coursing through the nuclear industry — but ingrained opposition is the biggest roadblock.

The great hope is that beyond the indirect, astrophysical evidence we have today, we’ll someday detect it directly. But what if we can’t?

Out of all the galaxies we know, only a few little ones are missing dark matter. At last, we finally understand why.

U.S. particle physicists recently recommended a list of major research projects that they hope will receive federal funding.

In logic, ‘reductio ad absurdum’ shows how flawed arguments fall apart. Our absurd Universe, however, often defies our intuitive reasoning.

It is time to give the Russian cosmologist the credit he deserves.

The raw ingredients just weren’t there. Thankfully, their predecessors were. Here on Earth, our planet practically overflows with life. After more than 4 billion years, life has spread to practically […]

With a bigger, better, and more sensitive detector, the XENON collaboration joins LZ and PANDA-X in constraining WIMP dark matter.

Finding it at all was a happy accident. Examining it further may help unlock the secrets hiding within the earliest galaxies of all.

Once only dark energy remains, empty space still won’t be completely empty. Imagine, if you dare, the very end of the Universe. The stars — past, present, and future — have all burned out. […]

From inside our Solar System, zodiacal light prevents us from seeing true darkness. From billions of miles away, New Horizons finally can.

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.

When the hot Big Bang first occurred, the Universe reached a maximum temperature never recreated since. What was it like back then?

Back in the 1930s, Fritz Zwicky postulated the existence of dark matter. No one took it seriously until Vera Rubin’s work: 40 years later.

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?

Back during the hot Big Bang, it wasn’t just charged particles and photons that were created, but also neutrinos. Where are they now?

The $21.5-billion project could involve tunneling hundreds of feet under Lake Geneva.

From a hot, dense, uniform state in its earliest moments, our entire known Universe arose. These unavoidable steps made it all possible.

Differences in the way that the Hubble constant—which measures the rate of cosmic expansion—are measured have profound implications for the future of cosmology.

Is the “big freeze” our inevitable fate, or can dark energy save us? When we look out at the Universe today, we see sources of light practically everywhere we look. In […]

Mathematically, it is a monster, but we can understand it in plain English.

For some reason, the charges on the electron and proton are equal and opposite, and their numbers are equal, too. But why?

Move over, IC 1101. You may be impressively large, but you never stood a chance against the largest known galaxy: Alcyoneus.

Something isn’t adding up, but it isn’t a calibration error. It’s been nearly 100 years since we discovered that the Universe was expanding. Ever since, the scientists who study the […]

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?

In the very early Universe, practically all particles were massless. Then the Higgs symmetry broke, and suddenly everything was different.

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?

There are many things on large scales that also appear on small scales. But is the Universe truly a fractal? If you take a look at the structures that form in […]

When we look out at the Universe, even with Hubble, we’re only seeing the closest, biggest, brightest galaxies. Here’s where the rest are.