Researchers have discovered evidence of one of the largest dinosaur mating "dance arenas" in present-day Colorado.

Neffra Matthews, a retired photogrammetrist for the Bureau of Land Management, was part of a research team in 2014 that first found evidence of dinosaur mating dances at Colorado’s Dinosaur Ridge.

A team of paleontologists led by National Geographic Explorer Paul Sereno uncovered a trove of dinosaur fossils in the Sahara ...