It's by neutrino scientist Dr.Ben Still, who answered a random question I threw out in the the Twittersphere a while ago. Now he's cooking up a post to answer another question I had rattling in my head (the standard model of particle physics says there are three generations of matter - how do we know there isn't a fourth, or more?).
This is great. But poor Ben may regret it, as I have LOTS of questions... ;)
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