An illustration of a four-eyed myllokunmingid, a jawless fish that lived more than 500 million years ago Xiangtong Lei and Sihang Zhang Many spine-bearing creatures, or vertebrates, have a curious bit ...

Ancient fossils reveal the oldest known vertebrates had four eyes. Remarkably preserved fossil specimens show they could see the world using four camera-type eyes, reshaping our understanding of how ...

There is considerable interest in understanding how vision and image-forming eyes evolved, and scientists tend to take it for granted that most vertebrates have two eyes. Writing in Nature, Lei et al.

Ancient fossils reveal the oldest known vertebrates had four eyes. Remarkably preserved fossil specimens show they could see the world using four camera-type eyes, reshaping our understanding of how ...