The 2015 Nobel Prize in Physics has been awarded f
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First proposed by the Austrian Wolfgang Pauli in 1930, neutrinos are among the 17-odd irreducible building blocks of the world around us.
They're also wallflowers in the world of sub-atomic particles, rarely interacting with the other matter around them.
Scientists estimate that a neutrino is capable of passing through
a light-year (about 10 trillion km) of lead without hitting a single atom.