{"id":297611,"date":"2026-02-18T16:14:10","date_gmt":"2026-02-18T16:14:10","guid":{"rendered":"https:\/\/www.newsbeep.com\/il\/297611\/"},"modified":"2026-02-18T16:14:10","modified_gmt":"2026-02-18T16:14:10","slug":"four-eyed-vertebrates-the-worlds-oldest-vertebrates-had-four-eyes-scientists-reveal-in-stunning-discovery","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/il\/297611\/","title":{"rendered":"four-eyed vertebrates: The world\u2019s oldest vertebrates had four eyes, scientists reveal in stunning discovery"},"content":{"rendered":"

The evolution of vertebrates<\/a> is a story that stretches back over half a billion years. Among the most remarkable discoveries are fossils of myllokunmingiids<\/a>, prehistoric jawless fish from the Cambrian period<\/a>, which suggest that early vertebrates<\/a> may have had four eyes. Fossil evidence from more than 518 million years ago indicates that the prehistoric fish<\/a> genus myllokunmingiid possessed not merely a pair of lateral eyes but an extra pair in the center of their head. These discoveries shed light on the visual sophistication of early vertebrates and offer hints to the evolutionary origins of the pineal gland<\/a>, a deep-brain organ in modern humans sometimes termed as the \u201cthird eye.\u201d<\/p>\n

Discovery of the Oldest Known Vertebrate The myllokunmingiid is a prehistoric fish that lived near modern-day China and represents the oldest recognized fossil vertebrate. Researchers analyzed 10 specimens, which includes six of H. ercaicunensis and four other unidentified myllokunmingiids, all excavated from the Chengjiang Formation, a fossil-rich place preserving the diversity of Cambrian marine life.<\/p>\n

\u201cThis changes how we think about the early evolution of vertebrates,\u201d stated co-author Jakob Vinther of the University of Bristol, U.K. \u201cIt turns out our ancestors were visually sophisticated animals navigating a dangerous world.\u201d<\/p>\n

\"ETLive Events
Revealing the Four Eyes\u201cFossil eyes are incredibly rare, you wouldn\u2019t expect something as delicate as an eye to survive for hundreds of millions of years,\u201d described Professor Emeritus Sarah Gabbott from the University of Leicester, U.K. \u201cYet under the right conditions they can, and when they do, they open a rare window into how extinct animals saw and experienced their world.\u201d
Microscopic and chemical examinations disclosed two large lateral eyes and two smaller median eyes in the middle of the head. All four eyes were \u201ccamera-type eyes,\u201d which is similar to those discovered in contemporary vertebrates, which means they developed images using light. The researchers discovered melanosomes, organelles that generate and store melanin, in all four eyes. Circular structures resembling lenses were also detected, suggesting that the eyes could form comprehended images, not merely determine light.
The Pineal Gland: The Ancient \u201cThird Eye\u201dModern vertebrates lost the central pair of eyes, but traces endure as the pineal gland, situated deep in the brain, which controls sleep by generating melatonin in response to light. Sometimes termed as the \u201cthird eye,\u201d it can still determine light in certain species of fish, amphibians, and reptiles.<\/p>\n

\u201cWhat we\u2019re seeing is that the pineal organs began as image-forming eyes,\u201d cited Professor Peiyun Cong of Yunnan University, China. \u201cOnly later in evolution did they shrink, lose visual power, and take on their modern role in regulating sleep.\u201d<\/p>\n

Why Four Eyes EvolvedThe study indicates that the additional eyes offered an evolutionary benefit during the Cambrian explosion, a duration when large predators like squid-like radiodonts and marine worms appeared. This deep predator-prey dynamic could have driven \u201csensory repertoire innovation\u201d in both predators and prey. A second pair of eyes probably aided myllokunmingiids to identify threats, navigate their habitat, and survive in the dangerous Cambrian \u201cDark Forest.\u201dEvidence from Kunming FossilsFossils from the Kunming region of China preserved two myllokunmingid species with four black spots on the head: two lateral eyes and a central pair on top.Earlier , researchers believed the median pair were nasal capsules, but electron microscopy disclosed melanosomes, confirming they were real eyes capable of developing images. Vinther commented that the fossils were \u201cquite exciting to show that we have melanin preserved that goes that far back (518 million years).\u201d Lens impressions led to the conclusion\u201cso they felt like they were eyes,\u201d stating, \u201cThe animal had two big eyes on the side and two small eyes on the top, and both of them were camera eyes.\u201dFAQs:
Q1. What does \u201cfour-eyed vertebrates\u201d mean?
It refers to ancient jawless fish<\/a> that had two additional eyes on top of their heads. These were completely functional and helped expand their visual field.<\/p>\n

Q2. When did these four-eyed vertebrates<\/a> live?
They lived during the early Cambrian period, almost 518 million years ago.<\/p>\n","protected":false},"excerpt":{"rendered":"The evolution of vertebrates is a story that stretches back over half a billion years. Among the most…\n","protected":false},"author":2,"featured_media":297612,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[150648,150646,150647,150651,150644,85,46,150645,150650,150652,125617,141,150649],"class_list":{"0":"post-297611","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-ancient-jawless-fish","9":"tag-cambrian-period","10":"tag-evolution-of-vertebrates","11":"tag-fossilized-vertebrates","12":"tag-four-eyed-vertebrates","13":"tag-il","14":"tag-israel","15":"tag-myllokunmingiids","16":"tag-oldest-vertebrates","17":"tag-pineal-gland","18":"tag-prehistoric-fish","19":"tag-science","20":"tag-vertebrates"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/297611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/comments?post=297611"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/297611\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media\/297612"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media?parent=297611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/categories?post=297611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/tags?post=297611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}