In 1970, Jean-Marie Souriau demonstrated, through the complete Poincaré group of dynamic group theory, that reversing the energy of a particle (hence its mass, if the particle has one) is equal to reversing its arrow of time.
Negative mass leads to some funky stuff. Who knows? Some of the wild conspiracy theories about hidden science could be right.
“its arrow of time.”
Only humans can speak a word/sound that macht nichts ..
Unicorn,mermaid,and on and on.....
Now I can take more time to agree or disagree with the premise of this article...
However anything Gauss, Levi-Civita, or Einstein says is OK with me... Although one of them was a soccer player, so I have to factor in some amount of disbelief in his statements......