Fossil Tooth

The recent discovery of a fossil tooth in a mangrove swamp in Argentina, provides new evidence for the theory that all the continents were once joined together in one large land mass. Further investigation revealed that the tooth was almost identical to that of a creature called the Obdurodon, a giant plant-eating ancestor of the platypus, which lived 25 million years ago in south Australia. if there were once similar creatures living in Argentina and Australia, then the land masses of the two continents must have, at that time been joined together. Furthermore it is likely that in the far distant past, all the continents were part of a supercontinent "Gondwanaland".

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