Broken arms and collateral damage:clues to predator-driven evolution

ANN ARBOR—Ever since Darwin’s day, scientists have been trying to understand how interactions among living creatures—competition and predation, for example—drive evolution.

Recent work by paleontologists Tomasz Baumiller of the University of Michigan and Forest Gahn of the Smithsonian’s National Museum of Natural History offers new insights into the process. A report on their research appears in today