Dr. Charles Helm has contributed to numerous fossil discoveries in the area, from crocodile and dinosaur tracks, to fish fossils, marine reptile fossils, and more.

The researchers say they found evidence in North Dakota of the asteroid hit in Mexico, including fish with hot glass in their gills from flaming debris that showered back down on Earth.

Scientists at the Channel Islands National Park, just off the Southern California coast, have excavated a rare and well-preserved mammoth skull fossil from Santa Rosa Island.