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500-Million-Year-Old Brains Hint at How Animal Heads Have Evolved

Olm the Water King

Olm the Water King

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500-Million-Year-Old Brains Hint at How Animal Heads Have Evolved | IFLScience

500-Million-Year-Old Brains Hint at How Animal Heads Have Evolved

May 8, 2015 | by Janet Fang

By examining some of the oldest fossil brains ever discovered, researchers have a better idea of how heads (as we know it) first evolved in early animals. The 500-million-year-old preserved brains belonged to early ancestors of arthropods, the wildly diverse group that includes insects, spiders, and crustaceans. The findings, published in Current Biology this week, identifies a key moment in the shift from worm-like arthropod ancestors with soft bodies to those with a hard exterior like the ones we’re more familiar with today.

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