Sky monsters /

As big a force as pterosaurs were in the history of life, they have largely remained a mystery to scientists. Now with the help of amazing special effects and engineering, learn about remarkable new discoveries that shed light on these creatures.

Bibliographic Details

Corporate Authors:	National Geographic Society (U.S.), Warner Home Video (Firm)
Format:	Video DVD
Language:	English
Language Notes:	Closed-captioned.
Series:	National Geographic special.
Subjects:	Pterosauria. Extinct birds. Documentary television programs. Documentary > Television special. Films for the hearing impaired.