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TIBURONPEDIA » Tiburones. Enciclopedia Especializada

TIBURONPEDIA » Tiburones. Enciclopedia Especializada

All of the monotremes, or egg-laying mammals such as the platypus and echidna, lost their stomachs during the course of evolution.

Why the Platypus Will Never Have a Stomach

All of the monotremes, or egg-laying mammals such as the platypus and echidna, lost their stomachs during the course of evolution.

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