On April 25th, researchers published findings in Physical Review Letters suggesting that gravitational waves — ripples in spacetime — may have done something far more significant than just echo through the early universe. In the chaotic first moments after the Big Bang, those ripples may have actively manufactured dark matter itself. The mechanism: gravitational wave production in the earliest window of cosmic history could have generated particles that became the invisible substance shaping every galaxy we see today. If the math holds up, it's a brand new mechanism for dark matter production — and a clue to one of the deepest unsolved problems in physics.
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