These tiny fish climb waterfall cliffs for 10 hours

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Nearly all fish spend their entire lives in water—it’s sort of a big qualification to classify as a fish, after all. However, some species occasionally behave in ways that recall their land-curious evolutionary ancestors. After multiple excursions in the…

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Pee changes how some mushrooms ‘talk’

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Mushrooms are social butterflies. Seemingly small communities of fungi separated by hundreds of feet are frequently connected via vast underground webs known as mycelial networks. While these allow the fungi to share vital information about their surroundings and environmental…

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Do water picks really work? Dentists weigh in.

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Perhaps you are one of the many Americans who have a small boxy tank balanced precariously on their bathroom sink. Or maybe you’ve seen one at a friend’s house—the appliances known as water flossers, oral irrigators, or often by…

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