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Dark Matter — Topic Summaries

AI-powered summaries of 21 videos about Dark Matter.

21 summaries

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What If Our Understanding of Gravity Is Wrong?

PBS Space Time · 3 min read

The search for dark matter has lasted more than half a century, but a growing line of thought argues the real problem may be gravity itself. Instead...

Dark MatterModified GravityMOND

What Happens If A Black Hole Hits Earth?

PBS Space Time · 3 min read

A black hole hitting Earth is unlikely to be noticed in real time—but if primordial black holes exist in the “asteroid-mass” range, they could still...

Primordial Black HolesDark MatterEddington Limit

Is Dark Matter Made of Particles?

PBS Space Time · 3 min read

Dark matter is almost certainly made of particles from a “dark sector” that barely interact with ordinary matter—so it neither emits nor absorbs...

Dark MatterDark SectorCold Dark Matter

Black Holes from the Dawn of Time

PBS Space Time · 3 min read

Black holes may have formed in the universe’s first moments—and if they did, some could still exist today as “primordial black holes” (PBHs). The key...

Primordial Black HolesCosmic InflationMicrolensing

What If There's A Black Hole Inside The Sun? | Hawking Stars

PBS Space Time · 3 min read

A captured primordial black hole inside a star would quietly change the star’s internal physics for billions of years—eventually forcing it into a...

Primordial Black HolesHawking StarsAsteroseismology

How Many Black Holes Are In The Solar System?

PBS Space Time · 3 min read

Dark matter may be detectable without particle detectors or telescopes—by treating the solar system itself as a giant “primordial black hole” (PBH)...

Primordial Black HolesDark MatterGravitational Lensing

What If Dark Matter Is Just Black Holes?

PBS Space Time · 3 min read

Dark matter may not be made of black holes after all. By checking how black holes would have to be distributed—matching the dark-matter halo around...

Dark MatterPrimordial Black HolesMicrolensing

Are Axions Dark Matter?

PBS Space Time · 3 min read

Axions are a leading candidate for solving a major mismatch between quantum theory and experiment in the strong nuclear force—and they may also...

AxionsStrong CP ProblemPeccei–Quinn Mechanism

No Dark Matter = Proof of Dark Matter?

PBS Space Time · 3 min read

Dark matter may be real after all—not because a particle has been detected, but because some galaxies appear to contain little or none of it,...

Dark MatterModified GravityGravitational Lensing

Are Dark Matter And Dark Energy The Same?

PBS Space Time · 3 min read

A new proposal tries to unify dark matter and dark energy by treating them as outcomes of the same underlying phenomenon: negative mass. The idea,...

Dark MatterDark EnergyNegative Mass

How I Became Particle Physicists’ Enemy #1

Sabine Hossenfelder · 3 min read

Particle physicists’ push for ever-larger colliders is portrayed as a costly detour driven by decades of “nonsense” theory-making—an approach that,...

Particle CollidersFoundations of PhysicsTheory Development

Most of Reality Is Invisible. We May Finally Be About to Reveal It.

PBS Space Time · 3 min read

The Large Hadron Collider may be able to “open a portal” to a hidden dark sector—not by creating black holes or wormholes, but by producing Higgs...

Dark SectorHiggs PortalHigh Luminosity LHC

Did One Single Neutrino Just Prove Stephen Hawking Right?

Sabine Hossenfelder · 3 min read

A single ultra-high-energy neutrino detection is being floated as a potential clue to Hawking’s long-standing prediction that black holes...

Hawking RadiationPrimordial Black HolesNeutrino Astronomy

New Data Bring Trouble For Theory of Universe

Sabine Hossenfelder · 3 min read

A new radio-telescope analysis claims the Solar System is moving about 3.7 times faster than the standard cosmological model predicts—an apparent...

Cosmic Microwave BackgroundDoppler BoostingRadio Galaxies

Strange New Observations Reveal Major Clue About Dark Matter

Sabine Hossenfelder · 3 min read

Small dwarf galaxies appear to be clustering together more than standard dark matter models predict—an anomaly that points toward dark matter having...

Dark MatterDwarf GalaxiesSelf-Interacting Dark Matter

Action at a Distance Can Explain Dark Matter, Physicists Show

Sabine Hossenfelder · 2 min read

Physicists may have been chasing the wrong culprit for the universe’s missing mass: instead of inventing dark matter, some researchers are proposing...

Non-Local GravityDark MatterMOND

Magnetic Charges Could Actually Exist, Physicists Find

Sabine Hossenfelder · 2 min read

Magnetic monopoles—hypothetical particles carrying only a single magnetic pole (north or south)—have long been attractive because they would make...

Magnetic MonopolesMaxwell EquationsCharge Quantization

How long will it take to solve the 5 big physics problems?

Sabine Hossenfelder · 3 min read

Progress in fundamental physics may accelerate in the next decade or two, but not because long-sought “theories of everything” are suddenly within...

Quantum GravityDark MatterDark Energy

New Theory: Space has Memory Which Appears Like Dark Matter

Sabine Hossenfelder · 2 min read

A new line of theoretical work proposes that spacetime stores a “memory” of matter that passes through it—and that this stored information could...

Quantum Memory MatrixGravitational MemoryDark Matter

Nuclear Fusion Reactors Could Produce Dark Matter, Physicists Show

Sabine Hossenfelder · 3 min read

Fusion reactors might be able to generate axions—an especially popular dark-matter candidate—at rates high enough to measure, making nearby...

AxionsDark MatterDeuterium–Tritium Fusion

Is Gravity Modified or is it Dark Matter after all?

Sabine Hossenfelder · 3 min read

The latest push in the long-running debate over whether gravity needs modification—or whether unseen dark matter is the better fit—turns on a single...

MONDWide BinariesDark Matter