Fossil reveals world's oldest genitals: The discovery of the world's oldest genitals proves that little has changed over the last 400 million years - at least for daddy-long-legs.
Fossils of harvestmen arachnids (Opiliones) have been found by palaeontologists in an ancient rock at Rhynie near Aberdeen in Scotland. Preserved within a male is a penis two-thirds the length of his body, and on a female there is a long egg-laying organ known as an ovipositor.
The organs are remarkably similar to those in modern-day species of harvestmen.
