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June 12, 2020

Sneezin' in the Rain | Why do we SNEEZE after RAINSTORMS?

Everyone with seasonal allergies is familiar with how troublesome pollen grains can be, but new research from the University of Iowa unveils just how insidious fragmented pollen can be. Since pollen grains can break up in high humidity, during storms they are swept up into the storm’s updraft and then fragment. The fragments are way smaller -- sometimes about 1/10th of a grain. These ultralight fragments go flying and get blown back downward with the rain—but unlike pollen grains, which settle to the ground, pollen fragments remain in the air.

Credit: National Science Foundation/University of Iowa

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