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  1. 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. If true, that would solve a long-standing mystery.

    By Nikk Ogasa
  2. Health & Medicine

    Don’t use unsterilized tap water to rinse your sinuses. It may carry brain-eating amoebas

    Two new studies document rare cases in which people who rinsed sinuses with unsterilized tap got infected with brain-eating amoebas.

    By Tina Hesman Saey
  3. Animals

    Male dragonflies’ wax coats might protect them against a warming climate

    The reflective wax, which cools males on sunny courtship flights, may also armor them against the effects of climate change.