Growth Secrets of the Hydra The tiny hydra, a relative of jellyfish and a favorite in school biology labs, can regrow a whole animal from a piece, partly because even small remnants contain part of a protein scaffold that guides development. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Feature: Who’s Afraid of the Big Bad Wolf Scientist?Proof of Children’s Vaccinations? Italy Will Now Take Parents’ Word for ItThe Science (and the Scientists) Behind Ant-ManLions Eat Men Suspected of Poaching Rhinos. Some Saw ‘Karma.’How Andrew Wheeler, the New Acting E.P.A. Chief, Differs From Scott PruittIt’s Hot Out. Here Are Some Tips to Stay Cool.