AI Summary

Scientists have put forward a new theory that a long‑overlooked particle could explain why the universe contains matter rather than nothing. The proposal argues that this forgotten particle played a crucial role in the early cosmos, influencing conditions that allowed matter to survive after the Big Bang. It addresses the fundamental puzzle of why matter and antimatter, produced in nearly equal amounts, did not completely annihilate each other, which would have left no material for stars, planets or life.

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