I recently read about a particle that has mass only in one direction?

This is a minor point, but what was discovered wasn't an actual particle, but something called a quasiparticle.

A quasiparticle can be a combination of particles (or even a lack of particles) that give the impression of acting like a real particle, but aren't the same thing.

More info about the discovered quasiparticle is here:
https://phys.org/news/2024-12-particle-mass.html

And info about quasiparticles in general here:
https://en.m.wikipedia.org/wiki/Quasiparticle

 

This is a minor point, but what was discovered wasn't an actual particle, but something called a quasiparticle.

A quasiparticle can be a combination of particles (or even a lack of particles) that give the impression of acting like a real particle, but aren't the same thing.

More info about the discovered quasiparticle is here:
https://phys.org/news/2024-12-particle-mass.html

And info about quasiparticles in general here:
https://en.m.wikipedia.org/wiki/Quasiparticle

+1 it's a major point.

It's a collective particles behavior that's common in nature even at much larger scales. From the article link.

"Imagine the particle is a tiny train confined to a network of tracks, which are the material's underlying electronic structure," Shao said. "Now, at certain points the tracks intersect, so our particle train is moving along its fast track, at light speed, but then it hits an intersection and needs to switch to a perpendicular track. Suddenly, it experiences resistance, it has mass. The particles are either all energy or have mass depending on the direction of their movement along the material's 'tracks.'"

 

 

https://scitechdaily.com/no-more-si...y-could-finally-solve-the-black-hole-mystery/

No More Singularities? Quantum Gravity Could Finally Solve the Black Hole Mystery

By using pure gravity rather than exotic matter, their new model challenges previous theories and brings us closer to understanding the true nature of spacetime. This breakthrough not only simplifies the conditions for black hole
A black hole is a place in space where the gravitational field is so strong that not even light can escape it. Astronomers classify black holes into three categories by size: miniature, stellar, and supermassive black holes. Miniature black holes could have a mass smaller than our Sun and supermassive black holes could have a mass equivalent to billions of our Sun.



Just a rock in the middle. No supernatural powers.
https://www.sciencedirect.com/science/article/pii/S0370269325000206
Regular black holes from pure gravity