Photographer: Calvin J. Hamilton
Date Taken: 2012-10-06
Location: Mastodon State Historic Site, Imperial, MO

Photographer: Calvin J. Hamilton
Date Taken: 2012-03-22
Location: Chillicothe Ohio

Photographer: Calvin J. Hamilton
Date Taken: 2012-03-20
Location: Newark, Ohio

Photographer: Calvin J. Hamilton
Date Taken: 2012-03-19
Location: Miamisburg Mound, Ohio

Photographer: Calvin J. Hamilton
Date Taken: 2009-04-24
Location: East of Lake Mills, Wisconsin

Photographer: Calvin J. Hamilton
Date Taken: 2006-05-29
Location: John Johnson Farm, Ohio

Photographer: Calvin J. Hamilton
Date Taken: 2006-06-06
Location: Dinosaur Ridge, Morrison, Colorado

Photographer: Calvin J. Hamilton
Date Taken: 2006-06-06
Location: Dinosaur Ridge, Morrison, Colorado

Photographer: Calvin J. Hamilton
Date Taken: 2010-01-18
Location: Kuliouou Ridge Trail, Hawaii

Photographer: Calvin J. Hamilton
Date Taken: 2009-09-02
Location: Magadan, Russia

Photographer: Calvin J. Hamilton
Date Taken: 2006-05-30
Location: Newark, Ohio

Sculptor: Charlie Norton
Date Taken: 2006-06-05
Location: Oakley, Kansas

Date Taken: 2006-06-01
Location: Collinsville, Illinois.

Photographer: Calvin J. Hamilton
Date Added: 2008-11-10
Location: Pueblo Vieja, Bugabita Chinqui, Panama

Artist: Massimiliano Ravenna
Date Added: 2008-01-02
Location: American