Rare fossils uncovered in Colorado show an unexpected swamp-dwelling creature lived among the dinosaurs millions of years ago ...

"So it's really neat to see this slice of time preserved in Colorado." Compared to much larger dinosaurs living at the time like tyrannosaurs or the horned ancestors of Triceratops, the new fossil ...

And while a creature no bigger than 2 to 5 pounds “might seem tiny and insignificant,” especially compared to “much larger dinosaurs living at the time like tyrannosaurs or the horned ancest ...