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.
Click to visit the previous Marine Specie bio. The Plesiosaurus was a moderate sized marine reptile which existed during the early Jurassic period of the Mesozoic era. It swam the oceans about 200 to 169 million years ago. This time period lies in the Hettangian and Aalenian ages of the Jurassic period. Plesiosaurs are believed to have evolved from the Triassic Nothosaurs.