Every time I write about particle physics, I encounter a moment of uncertainty about a quantity that, at first glance, ought to be clear. How many kinds of elementary particles should I say there are?
Sitting in a restaurant, you reach for the ketchup bottle, eyeing the basket of fries in front of you. You give the bottle a shake, then a tap. For a moment, nothing happens—the ketchup clings ...
The first of a new generation of neutrino experiments has begun to make its mark. With just two months of data, the Jiangmen Underground Neutrino Observatory (JUNO) experiment in Guangdong, China, has ...
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