Ken Zirkel:
Fossil footprint
Ken Zirkel:
Fossil footprint
Ken Zirkel:
Fossil footprint
Ken Zirkel:
Fossil footprint
Ken Zirkel:
Fossil footprint
Ken Zirkel:
Blue whale
Ken Zirkel:
Allosaurus skeleton, Theodore Roosevelt Rotunda
Ken Zirkel:
Hall of Gems
Ken Zirkel:
American Museum of Natural History
Ken Zirkel:
Tyrannosaurus Rex
Ken Zirkel:
Museum of Natural History
Ken Zirkel:
Tyrannosaurus Rex
Ken Zirkel:
Koala Skeleton
Ken Zirkel:
Triceratops fossil
Ken Zirkel:
Australopithecus Afarensis fossil
Ken Zirkel:
Australopithecus Africanus fossil
Ken Zirkel:
Koalas and their relatives
Ken Zirkel:
San Diego
Ken Zirkel:
Give me Money!
Ken Zirkel:
Natural History Museum
Ken Zirkel:
Natural History Museum
Ken Zirkel:
Natural History Museum
Ken Zirkel:
Natural History Museum
Ken Zirkel:
San Diego Natural History Museum
Ken Zirkel:
Museum of the Earth
Ken Zirkel:
Museum of the Earth
Ken Zirkel:
Museum of the Earth
Ken Zirkel:
Hyde Park Mastodon