The mystery of metamorphosis

How does a caterpillar transform into a butterfly, or plankton-feeding larvae grow into gorgeous sea stars? Metamorphosis has captivated our imagination for thousands of years. Yet it remains, largely, a mystery. Award-winning author Frank Ryan delves into that mystery with the keen eye of a scientist, the skill of an expert storyteller, and the tenacity of a detective tracking down one of science's least-understood phenomena.