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What are mammals? Do mammals exist now? |
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Answer» ong>ANSWER: Only two kinds of egg-laying mammals are left on the PLANET today—the duck-billed platypus and the echidna, or spiny anteater. These odd “MONOTREMES” once dominated AUSTRALIA, until their pouch-bearing cousins, the marsupials, invaded the land down under 71 million to 54 million YEARS ago and swept them away |
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