The Big Bang — that faster-than-light expansion that marked the beginning of the universe — seems like it would be a hard thing to prove. It would have happened a long, long time ago somewhere far, far away. We don't have time machines or intergalactic spacecraft, so it'd be understandable to assume that the Big Bang is just a theory we'll never prove. On the contrary: If the Big Bang happened, it would have left some telltale signs we can detect today, from our cozy confines here on Earth. It turns out that, over the last century, scientists have found almost all of those signs, one by one. And just last month, a research team announced that they'd found a piece of evidence that many thought would be impossible to detect: the first neutrinos from one second after the Big Bang.
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Written by Ashley Hamer March 26, 2019
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