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Primordial gravitational waves found: researchers see traces of cosmic expansion just after Big Bang.
Astronomers have detected the earliest echoes of the Big Bang, confirming a decades-old hypothesis that describes the universe's ultrafast expansion during its first moments. The findings provide researchers with the first direct measurement of conditions at nearly the instant that cosmic expansion began, and may have far-reaching implications for physicists' understanding of general relativity, quantum mechanics and the origin of the universe.
"We now have a much stronger...
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