JAIME CHIRINOS / SCIENCE PHOTO LIBRARY JAIME CHIRINOS / SCIENCE PHOTO LIBRARY
Mapusaurus, artwork. Mapusaurus (meaning 'earth lizard') was a bipedal carnivorous theropod dinosaur that lived around 100 million years ago. Several Mapusaurus fossils have been discovered in Argentina. When alive, an adult would have measured over 12.5 metres in length, and weighed over three tons. It is thought Mapusaurus hunted in packs.
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