photo of a large elm tree in a suburban settingThe notorious Dutch elm disease has ravaged elm trees across the world for more than a century, but some have nevertheless managed to survive. Carolyn Bernhardt (@CarolBernie11) writes for the Minnesota Invasive Terrestrial Plants and Pests Center’s website about the scientists who are identifying, studying and propagating Dutch-elm resistant trees in order for this magnificent genus to thrive once again. Photo: Msact via Wikimedia Commons