What is it? The skull sectioned is a drawing by Leonardo da Vinci (1452-1519) and, dating from 1489, one of his earliest human anatomical studies. That year, for the first time, he had acquired a ...

NOTE: The article below contains a disturbing photo that may startle some readers. Be advised. Thrift stores can be a treasure trove of bargains and big-time scores, but once in a while something so ...

(CNN) — Paleontologists with the Smithsonian National Museum of Natural History have discovered a previously unknown prehistoric species — a 270 million-year-old amphibian with wide eyes and a ...