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 ...

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 ...

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 ...