bhs sex video lacking them, if they are female suggesting this form of fish-sex has an ancient origin.">

Sex of fossil bison. Carboniferous - Ma.

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Silurian - Ma.

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It may come as a surprise to discover that many male mammals on the earth today possess a penis bone.

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Rare glimpses in the fossil record suggest sex was as complicated and varied in the past as it is in the animal kingdom today.

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But because insects have no bones, they rarely preserve in deep time.

A cloaca is the opening through which most vertebrate animals excrete their waste and have sex.

I met Brassey after her fascinating lecture at a palaeontological conference last year.

Brassey admitted that people have mixed reactions to her work due to the explicit nature of the subject matter.

How did dinosaurs do it?

Permian - Ma.

Jurassic - Ma.