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.
Quick Plesiosaurus Facts. 1  Lived from the Early to the Middle Jurassic Period. 2  Lived in oceans all over the world. 3  Was a marine reptile. 4  May have laid eggs in the sand like sea turtles. 5  Was twice as long as a horse. 6  Weighed twice as much as a pig. 7  They breathed air. 8  Was a Piscivore and/or Carnivore.