Earlier this year, an underwater detector in the Mediterranean Sea found the most energetic neutrino to date. And scientists are still talking about it because, well, this discovery could be a really big deal. Not only could this neutrino, also known as a "ghost particle," have been fleeing a gamma-ray burst or a supermassive black hole, but it could also have been produced by an ultra-powerful cosmic ray interacting with the cosmic microwave background (CMB).
That latter bit which we'll get to soon, could be huge. Moreover, the detector that pinpointed this particle isn't even totally built yet — once put together, who knows what it can accomplish. "We're excited to have observed this event and we're hungry and curious for more," KM3NeT's spokesperson, Paul de Jong of the University of Amsterdam, told Space.com
