For particle physicists working with neutrinos, almost nothing is everything

For particle physicists working with neutrinos, almost nothing is everything Several massive multimillion dollar experiments should soon reveal more about the nature of these ghostly particles Imagine you are given three gumballs of different flavors. You are told that one of them is heavier than the others, and one is lighter. But which is which? Your task is made difficult by the fact that these gumballs weigh nearly nothing. And sometimes they swap flavors. Oh, and when you try to pick them..