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  1. Readers discuss tardigrades, poison dart frogs and more

    By Science News Staff
  2. Health & Medicine

    Long COVID brain fog may be due to damaged blood vessels in the brain

    MRI scans of long COVID patients with brain fog suggest that the blood brain barrier may be leaky.

    By Meghan Rosen
  3. Animals

    Daddy longlegs look like they have two eyes. That doesn’t count the hidden ones

    Despite its two-eyed appearance, Phalangium opilio has six peepers. The four optical remnants shed light on the arachnids’ evolutionary history.

    By McKenzie Prillaman
  4. Planetary Science

    Titan’s dark dunes could be made from comets

    Saturn’s largest moon could have gotten its sands from an ancient reshuffling of the solar system.