A pair of fossilized, eel-like fish found just south of Glasgow has provided what scientists are calling the earliest known evidence of advanced, camera-like eyes in vertebrates. Dating back 443 million years, these rare finds are reshaping the understanding of how complex features like eyes and bone-like tissues developed in early animals. Diagram showing when camera-type eyes and bone first emerged in early vertebrates. Early vertebrates often lacked bones and were poorly preserved in the fossil record, making them difficult to study. These Scottish fossils suggest that fundamental features of vertebrate anatomy, including vision and skeletal structures, originated far earlier than once assumed.