DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY
Supersaurus dinosaurs. Computer illustration of a group of Supersaurus sp. dinosaurs in a prehistoric forest. These herbivorous sauropods lived during the Late Jurassic Period (around 155 to 145 million years ago), in what is now western North America. They are among the largest known dinosaurs and are thought to have reached around 33 to 35 metres long and weighed around 35 to 40 tons.
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