Paleoanthropology:
Into the Pit of Human History
Ann Gibbons
One rich locality in Spain has yielded not only a new species, Homo antecessor, but also a cache of younger bones--the remains of at least 32 young adults of H. heidelbergensis. Their bodies were apparently cast into a pit some 300,000 years ago, but researchers are still puzzling over what--or who--killed them.