NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY
Iguanodon dinosaur, fossil thumb spike. This herbivorous dinosaur lived 140 to 110 million years ago. It is though to have used its sharp-ended thumb to defend itself against predators. This specimen is part of the collections held at the Natural History Museum, London, UK.
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