The Field Medal was created to elevate promising mathematicians from underrepresented demographics. But has it followed through on that goal?
A few years ago, the first dark matter-free galaxies were announced, and then immediately disputed. Now, there are too many to ignore.
If dark matter exists in a large halo in our galaxy, made up of particles, then it's passing through us constantly. But how much?
Over time, the Universe becomes less dominated by dark matter and more dominated by dark energy. Is one transforming into the other?
Our Universe requires dark matter in order to make sense of things, astrophysically. Could massive photons do the trick?
Although most of the Universe's mass is dark matter, which gravitates just as well as normal matter, it still can't make black holes.
Despite all the challenges, Hubble has vindicated this discovery. Practically everywhere we look in the Universe, the large-scale objects that we see — small galaxies, large galaxies, groups and clusters of galaxies, […]
There's an extra source of massive "stuff" in our Universe beyond what gravitation and normal matter can explain. Could light be the answer?
The Universe is expanding, and the Hubble constant tells us how fast. But how can it be a constant if the expansion is accelerating?
Out of all the galaxies we know, only a few little ones are missing dark matter. At last, we finally understand why.
When stars form, they emit energetic radiation that boils gas away. But it can't stop gravitational collapse from making even newer stars.
At very high and very low temperatures, matter takes on properties that open up an entire Universe of remarkable new possibilities.
Everything is made of matter, not antimatter, including black holes. If antimatter black holes existed, what would they do?
Searching for dark matter, the XENON collaboration found absolutely nothing out of the ordinary. Here's why that's an extraordinary feat.
After years of analysis, the Event Horizon Telescope team has finally revealed what the Milky Way's central black hole looks like.
The key problem with the dark matter hypothesis is that nobody knows what form dark matter might take.
The newly discovered galaxies are 62 times bigger than the Milky Way.
The laws of physics state that you can't create or destroy matter without also creating or destroying an equal amount of antimatter. So how are we here?
More than any other of Einstein's equations, E = mc² is the most recognizable to people. But what does it all mean?
With two different black hole event horizons now directly imaged, we can see that they are, in fact, rings, not disks. But why?
13.8 billion years ago, the hot Big Bang gave rise to the Universe we know. Here's why the reverse, a Big Crunch, isn't how it will end.
Whatever’s lurking out there, it isn’t all, or even mostly, normal matter. When it comes to the Universe, it’s only natural to wonder what, exactly, it is that makes everything up. […]
Smashing things together at unprecedented energies sounds dangerous. But it's nothing the Universe hasn't already seen, and survived.
Both made monumental contributions that were far ahead of their time. It’s hard to believe, but the idea that the Universe was dominated not by normal matter but rather by dark […]
Dark matter has never been directly detected, but the astronomical evidence for its existence is overwhelming. Here's what to know.