A 500-million-year-old fossil just rewrote the spider origin story

ScienceDaily
Jul 24, 2025, 2:35 am28 pts
Half a billion years ago, a strange sea-dwelling creature called Mollisonia symmetrica may have paved the way for modern spiders. Using detailed fossil brain analysis, researchers uncovered neural patterns strikingly similar to today's arachnids—suggesting spiders evolved in the ocean, not on land as…

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