Bees from a single species aren't as effective in pollinating as bees from a diversity of species, a new study shows. © Romulic-Stojcic/Lumi Images/Corbis The world ...
Bees feed us. Many of the 20,000 species pollinate 85 percent of food crops and fruits around the world—everything from garlic and grapefruits to coffee and kale. Halictid bees—also called sweat bees ...
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