CATHERINE POUEDRAS / SCIENCE PHOTO LIBRARY CATHERINE POUEDRAS / SCIENCE PHOTO LIBRARY
Reconstruction of a dinosaur, Triceratops. One of the more distinctive dinosaur genera, Triceratops was a herbivore living on open grassland in the upper cretaceous period (about 70 million years before present). The formidable-looking horns were used for defence. The large frill-like process at the back of the cranium served to protect its neck from attack, and also provided a fixing point for the powerful neck muscles needed to support the skull. Some species, such as T.prorsus, reached about 8 metres in length. This reconstruction, based on skeletal remains, is at the Palais de la Decouverte, Paris.
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