Find out the origin of humanity's first mating

According to Nature, scientists have discovered the source of mating from the fossil observation of the catfish, living 385 million years ago in Scotland.

Fossil researchers say that intimate actions in human sexual relations come from the 'prehistoric armor' class of fish, scientific name Microbrachius dicki, of the group of catfish.

Fossil of a Microbrachius dicki male - (Photo: BBC News)

The fossil observation of a Microbrachius dicki male, the scientists found that its L-shaped genital limb bone (known as the conjoined nodule ), acts to transfer sperm to the female. For females, there are small pairs of bones, which are used to 'lock' the male genitalia during mating.

'Sharks were once considered dead-end, without any direct involvement with us. However, recent studies have shown that human evolution is deeply rooted in the skinfish. Some of our characteristics, such as jaws, teeth, and pair of limbs . are derived from this fish, "said John Long, a biologist at Flinders University, Australia.

Fish Microbrachius dicki.(Photo: Flinders University)

The fossil record showed that the catfish is the first organism to use internal fertilization and mate as a breeding strategy. This discovery plays an important role in the evolutionary history of sexual reproduction.

A more interesting finding from fossil samples, fish species almost perform mating on one side with their arm bones locked together, making them appear to be dancing rather than mating.

This shows that most men easily put the genital inside on the right side when mating.