Experts have recently discovered something incredible: the ancestors of present-day fish have been present on Earth for more than 500 million years! In a recent study, researchers from the University of Uppsala in Sweden examined the fossilized remains of several species of fish, including one of the oldest known vertebrates, the thick-skulled Myllokunmingia. They were amazed to find that the evolutionary changes between these ancient creatures and the fish of today are surprisingly small. This discovery has not only given us an incredible insight into the history of fish, but also into the history of life on Earth.

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source: Phys.org