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3:16
Emily meets up with geologist Dr. Mark Fahrenbach at Custer State Park.
5:13
Emily talks to Dr. Kelli Trujillo about the bacteria that made our planet oxygen-rich.
2:30
An infamous battle between two early paleontologists played out at the Morrison Formation.
3:18
The soil in North Dakota has clues from the day the dinosaurs went extinct.
2:35
Emily Graslie and Dr. Eileen Grogan look for fossil fish in Montana.
2:43
Emily Graslie talks to Kylie Ferguson, who made a surprising discovery as a kid.
