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  1. Microbes

    Scientists have found the first known microbes that can eat only viruses

    Lab experiments show that Halteria ciliates can chow down solely on viruses. Whether these “virovores” do the same in the wild is unclear.

    By Erin Garcia de Jesús
  2. Animals

    These adorable Australian spike-balls beat the heat with snot bubbles

    An echidna’s snot bubbles coat the spiny critter’s nose with moisture, which then evaporates and draws heat from the sinus, cooling the blood.

    By Elise Cutts
  3. Chemistry

    These chemists cracked the code to long-lasting Roman concrete

    Roman concrete has stood the test of time, so scientists searched ruins to unlock the ancient recipe that could help architecture and climate change.