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3 billion years old
" 2018 AIAA SPACE and Astronautics Forum and Exposition
Most abundant and diverse during the Triassic and Jurassic Periods
Above: Cetatea Poenari accessible by climbing 1
Maiasaura Vertebra - SOLD 1.91" Fossil with Stand triceratops 3 billion years oldMaiasaura was a large Ornithischian dinosaur from the Cretaceous Period. Related to Iguanodons, they are known primarily for nurturing their young past hatching, a behavior previously unknown of any dinosaur. The Maiasaura and its Hadrosaur cousins had specialized "duck bills" for mouths. These were in fact elongated rostral bone structures that gave the appearance of a beak, but actually housed hundreds of small teeth to grind through all manner of
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