What we see at Lightning Ridge is that by 100 million years ago, some of the monotremes still have five molars but some of them are down to three." Modern echidnas have no teeth and platypuses ...
Six monotremes living in the same place at the same time, 100 million years ago at Lightning Ridge, NSW. Clockwise from lower left: Opalios splendens, a newly described species dubbed an ...
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