This program analyzes how flight evolved not once but four times, in very different ways. Presenting a number of theories, the program examines how insects, pterosaurs, birds, and bats each took to the sky. Bug wings that may have evolved from larval gills into pond-crossing sails; flight feathers that could have begun as soft down on small dinosaurs; and bat wings that probably developed from the webbed paws of gliding rodents are considered. Convergent evolution and echolocation are also discussed. Original BBCW broadcast title: Airborne. (51 minutes)

Tell a Friend! Your Name: Your Email: Your Friend's Email: Your Message: We respect your privacy and will not use your friend's address without permission. Item#: EDP34450 Copyright date: ©2004 VHS ISBN 978-1-4213-1213-2 DVD ISBN 978-1-4213-1214-9

Part of the Series : Journey of Life: Evolution in Action

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