"Joseph Leidy" (1907)
Artist Samuel Murray

"Deinonychus" (1987)
Artist Kent Ullberg

Voices heard in the program:

Dr. Edward B. Daeschler is Curator of Vertebrate Zoology and Paleontology at The Academy of Natural Sciences.

Kent Ullberg is a sculptor and curator of natural history who created Deinonychus. 

Dr. Leonard Warren is the author of the biography Joseph Leidy: The Last Man Who Knew Everything. 

Segment Producer: Jonathan Menjivar


The Association for Public Art (formerly the Fairmount Park Art Association) presents Museum Without Walls™: AUDIO, an interpretive audio program for Philadelphia’s outdoor sculptures. Museum Without Walls™: AUDIO is presented in partnership with Philadelphia Parks & Recreation, and has been supported by The Pew Center for Arts & Heritage, the William Penn Foundation, and the National Endowment for the Humanities.

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