Mammals
in example sentence
When nails first appeared in the fossil record around 55.8 million years ago, claws had already been present for over 260 million years in the ancestors of
mammals
and reptiles.
More example sentences with word mammals
That's quite a bit more than just a few
mammals
that we're eating, like a cow or a pig or a sheep.
What we find is that over these 40-odd years that I and others have been studying chimpanzees and the other great apes, and, as I say, other
mammals
with complex brains and social systems, we have found that after all, there isn't a sharp line dividing humans from the rest of the animal kingdom.
This is just a tiny range actually: It's us mammals; we're one of these.
If we look across many, many different species of animals, not just us primates, but also including other mammals, birds, even marsupials like kangaroos and wombats, it turns out that there's a relationship between how long a childhood a species has and how big their brains are compared to their bodies and how smart and flexible they are.
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