Just a few fossil fragments of a tiny creature discovered thousands of miles north of its contemporaries have shaken our understanding of global dinosaur history. "It was basically the size of a ...

Illustration by Gabriel Ugueto, courtesy the University of Wisconsin-Madison A chicken-sized dinosaur fossil is challenging the mainstream view of how and when reptiles spread to the Northern ...

Just a few fossil fragments of a tiny creature discovered thousands of miles north of its contemporaries have shaken our understanding of global dinosaur history. "It was basically the size of a ...

They believed dinosaurs originated in the southern hemisphere, gradually spreading north. But fossil discovery in Wyoming is rewriting that story. Paleontologists at the University of Wisconsin ...