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Sentences with phrase «terrestrial placental mammals»
Until now, scientists thought that retroviruses traced back roughly 100 million years, about as old as
terrestrial placental mammals
.
https://www.seeker.com/
The researchers» conclusion that
terrestrial placental mammals
may have lived down under 110 million years earlier than expected, as reported in the November 21, 1997 issue of Science, could all but uproot the mammalian family tree.
https://www.scientificamerican.com/
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