SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Fossil shark tooth. Fossilised tooth from an extinct giant shark (Carcharodon or Carcharocles megalodon). Known only from teeth, it is thought that this shark reached 12 to 15 metres in length. It may be an ancestor of the modern great white. Sharks are predatory fish that first evolved in the Palaeozoic era (245-570 million years ago). This specimen dates from the Eocene period, 58 to 40 million years ago. Apart from teeth, few fossilised remains of prehistoric sharks exist because their skeletons were formed of cartilage, a less durable material than bone. Found in Bracklesham Bay, Sussex, UK.
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