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The oldest heart in the world, aged 380 million years, was found preserved inside a fossilized extinct fish. The fish, known as Gogo, was found in Western Australia. The minerals in the rock where it was found helped preserve its heart and other organs.

 

Photo by: https://pixabay.com/photos/fossil-petrification-stone-fish-514980/

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The navigator fish

Scientists attached electrodes to a goldfish to understand the fish’s navigational system. They found that nerve cells that have a decreasing activity as the fish

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