For decades, scientists have been boggled by outstanding questions about the fundamental nature of everything.
. Dark matter is needed to explain why stars orbit their galaxies faster than they should, and why light is bent by the gravity of invisible objects.
Mike Boylan-Kolchin, associate professor at the department of astronomy at the University of Texas at Austin, told:"The limiting factor in researching dark matter is that the only confirmed way it interacts with the rest of the Universe is through gravity, and gravity is really weak on scales where we can do direct experiments.
Then, scientists in Germany established that there was an upper limit to how much mass a neutrino could have—just over one electronvolt, which is around 500,000 times less than an electron.
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