5
Film
3
Dizi
Prehistoric Worlds
2020 · Self - Paleontologist and Director, Smithsonian
Ice Age Death Trap
2012 · Himself - Denver Museum of Nature & Science
24 Hours After: Asteroid Impact
2009
Polar Extremes
2020 · Host
Hvor træerne blokerer for lyset
2020 · Eric 'Concerned Ranger' Jones
NOVA
1974 · Host
Great Yellowstone Thaw
2017 · Himself - Presenter
2020
