The Philadelphia International Airport is the 9th busiest airport in the world. The Philadelphia Marketplace Food, Shops and services at the airport have a mind-boggling number of eateries, retail stores that sell everything that one can think of, and a number of newsstands.
(See a gallery of plesiosaur and pliosaur pictures.) Plesiosaurs (Greek for almost lizards) were large, long-necked, four-flippered marine reptiles that paddled their way through the oceans, lakes, rivers and swamps of the Jurassic and Cretaceous periods.
History of discovery[edit] Autograph letter concerning the discovery of Plesiosaurus, from Mary Anning. The first complete plesiosauroid skeletons were found in England by Mary Anning, in the early 19th century, and were amongst the first fossil vertebrates to be described by science.