For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those ...

SEATTLE — The Pacific Science Center will close its doors for five weeks beginning Sept. 2, marking the end of an era as it retires its dinosaur exhibit that has entertained visitors for four decades.

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, ...

New research in a North American “mummy zone” in eastern Wyoming reveals how giant duck-billed dinosaurs were preserved in striking detail.