These fossilized lamprey hatchlings disprove an age-old evolutionary theory ...Middle East

An illustration of the hatchling lamprey found in South Africa. (Kristen Tietjen/)You’re not descended from a water vampire. It’s probably not a possibility you’d considered until now, but for more than a hundred years, evolutionary biologists suspected that the lamprey, a jawless, eel-shaped, blood-sucking fish, was the closest living model of the very first vertebrates.Despite how that sounds, it’s not an unreasonable suspicion. The lamprey is one of a handful of animals that exist on the boundary between vertebrates and our invertebrate forebears. Adult lampreys have a spinal column and swim through the water in search of fish, which they latch onto and bleed out with a tooth-filled mouth

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