In May 2000, thousands of eager reporters and spectators packed the Field Museum of Natural History in Chicago. They were there for the dramatic unveiling of Sue.
She was the biggest, most complete Tyrannosaurus rex skeleton ever found. The 67-million-year-old remains told a dramatic story. A tooth fragment from another T. rex was found in one of “her” ribs. Actually, nobody knows if Sue is male or female. Also, one of Sue’s legs was broken. This kind of find is rare and thrilling for paleontologists—scientists who study the fossil remains of prehistoric animals and plants. But even simple fossils tell exciting stories, if you know how to read them.