For more than a century, physics has described nature using four fundamental interactions: gravity, electromagnetism, the strong nuclear force, and the weak nuclear force. That picture is ...

A weird force that skirts traditional physics norms has helped erase a smudge on the foundations of particle physics. It’s a phenomenon called the “neutrino force,” by which neutrinos could ...

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The Standard Model of Particle Physics accounts for four fundamental forces—strong, weak, electromagnetism, and gravity—but for decades, scientists have wondered if an elusive fifth force might be at ...

There are four fundamental forces in the universe: gravity, electromagnetism, and the strong and weak nuclear forces. They have wildly different strengths, with gravity being the weakest and strong ...