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9 tons (7 to 9 metric tons)
One of the theories on the formation of these mud balls is that they formed when portions of the bank eroded off and fell into the water
13---jellyfish---devonian
especially when the anthropologists' son Richard Leakey suggested it was the first hominin species to use stone tools
Allosaurus, brain endocast Ankylosaurus 9 tons (7 to 9This is a brain endocast of Allosaurus. An endocast or endocranial cast is a cast made of the mold formed by the impression the brain makes on the inside of the neurocranium (braincase), providing a replica of the brain with most of the details of its outer surface. Endocasts can also form naturally, when sediments fill the empty skull, after which the skull is destroyed and the cast fossilized. Scientists are increasingly utilizing computerized
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