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55.3 MB (55.0 MB compressed)
5162 x 3744 pixels
43.7 x 31.8 cm ⏐ 17.2 x 12.5 in (300dpi)
DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Apatosaurus vertebra. Fossilised bone from the spine of an Apatosaurus dinosaur. Apatosaurus, formerly known as Brontosaurus, was a sauropod dinosaur that lived around 154 to 150 million years ago, during the Jurassic period. It was one of the largest land animalsÂ that ever existed, with an average length well over 20 meters. From the Dinosaur National Monument, Utah, USA.
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