I must say that chimp fossils were about the last thing I would have expected to find there.

The epiphany for me was that I knew chimp mommies don't make these noises, so I knew something happened during evolution,

Oaths are the fossils of piety

They don't all look alike. There are some very different shapes, with implications of how these fossils walked.

The whole of language is a continuous process of metaphor, and the history of semantics is an aspect of the history of culture; language is at the same time a living thing and a museum of fossils of life and civilisations.

So, unlike in humans, every chimp male's sperm has to fight really hard to fertilize a single egg.