Bees may be small, but their impact is huge. 🐝 #NatGeoExplorer and urban ecologist Chris Schell (c.j.schell) shares how bees, as a keystone species, help ecosystems thrive. Their work supports not just what we eat, but the environments all species call home. Stay tuned as we pass the National Geographic Society flag to the next Explorer before it makes its way back to the National Geographic Museum of Exploration, opening June 26, in Washington, D.C. #PassTheFlag 🟦🟫🟩