One observation proves three theories
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Time was, a picture of an infinitely tiny point could have been described with a simple caption: “The universe, actual size.” That’s clearly not the case anymore, and it’s close to unanimously accepted that what changed everything was a primal explosion known as the Big Bang, which occurred 13.8 billion years ago. Now a single observation has all but nailed down the Big Bang, eliminating the few other remaining scientific theories about how the universe began. In the bargain, it has also at last confirmed the existence of what are known as gravitational waves and the inflationary universe.
Gravitational waves were first described by Albert Einstein, who 99 years ago envisioned all space-time as a sort of cosmic fabric that could be warped and jiggled the way a trampoline can be set shaking by a dropped bowling ball.