Author and science historian Oren Harman discusses his new book "Metamorphosis," a wide-ranging exploration of one of nature’s most astonishing and misunderstood processes.
Blending biology, history and art, Harman traces ideas of transformation from Aristotle to modern labs studying how a caterpillar becomes a butterfly. He explains why most animal species undergo metamorphosis, why such a costly process evolved, and why it’s so hard to define.
