Down and up in a cat, dried plasma, animalistic us, snot useful

This week’s Feedback column (that I write) in New Scientist magazine has four segments. Here are bits of each of them: A sick experiment —The phrase “what goes up must come down” isn’t obviously relevant to the insides of a cat. The countervailing “what goes down must come up” is, when that cat has swallowed something of dubious […]