The Many Ways of Being Human

9.8

WEIRD

A card shows two lines, one with arrowheads pointing in, the other with arrowheads pointing out. They are the same length, yet the bottom one still looks longer once you know better. The Müller-Lyer illusion opens a chapter on how a science took a narrow slice of humanity, mostly American students, for the human being, and on the acronym built to say so.