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Crinoids have been around in various forms since before the age of dinosaurs. Now experts descend into the deep to study the animals from a submersible.
First Air Date : Jan 27, 2009
Last Air date : Jun 29, 2022
Episode : 56 Episode
Season : 14 Season
Runtime: 27:14 minutes
Studio: PBS
Country: United States of America
Cast: Craig Sechler
