https://theconversation.com/our-modern-vision-evolved-from-an-ancient-one-eyed-worm-creature-278120; https://www.cell.com/current-biology/fulltext/S0960-9822(23)00988-0 (full text). "Our #study suggests that our #eyes descend from a worm-like #ancestor that was roaming the #oceans 600 million years ago. The same also applies to all #bilateral #animals, meaning animals whose bodies can be divided into roughly mirror-image left & right halves."