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    The Pufferfish’s Lethal Poison Shows Up Right Under Our Feet

    A flatworm that lives in soil and uses TTX to hunt down much larger earthwormsPeter Ducey Lurking in the soil, even under a most peaceful and well-nurtured garden, is a surprisingly fierce predator: Bipalium adventitium, an invasive flatworm that began appearing in the United States about 100 years ago, likely hitching a ride in potted […]

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    Decapitation, But Not Cannibalism, Might Transmit Memories

    Cross-section of a planarianJubal Harshaw via Shutterstock Earlier this year, scientists published a bizarre finding: A decapitated flatworm that grows a new head seems to retain memories from its old one. Weird—but not even close to the weirdest finding in the annals of flatworm memory research. Half a century ago, experiments by James McConnell the […]