Encomium
Scientists studying fossils have discovered that the intimate act of sexual intercourse used by humans was pioneered by ancient armoured fishes, called placoderms, some 385 million years ago in Scotland.
The scientists found that male fossils of the Microbrachius dicki, which belong to a placoderm group, developed bony L-shaped genital limbs called claspers to transfer sperm to females, while the females had small paired bones to lock the male organs in place during mating.
Placoderms are the earliest vertebrate ancestors of humans.
