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buckthorn pollen

Microscope image of pollen grains from common buckthorn. Toward the right of the image is a group of nine grains, purple in color and mostly triangular in shape with rounded corners. A tenth grain sits alone to the left. A scale bar indicates each grain is approximately 20 microns in diameter. Accompanying text reads "Rhamnus cathartica, Common Buckthorn, Michael Killewald, Isaacs Lab, Michigan State University, 400X, 2017."

A study of managed bumble bees and honey bees on a blueberry farm finds that most of the pollen they collect comes from other plants, suggesting that supplementing crops with a diversity of nearby plant types makes for healthier bees. After collecting pollen from bees returning to hives, researchers analyzed pollen types under a microscope, finding a wide variety, from plants such as blueberry, buckthorn, cherry, and many more. (Photo by Michael Killewald)

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