An international research team led by the Department of Botany and Biodiversity Research at the University of Vienna has made an extraordinary discovery: fossilized lime blossoms and fossilized bumble bees were found in 24-million-year-old sediments at the Enspel Fossil-Lagerstätte (Rhineland-Palatinate, Germany)—along with evidence of their interaction in the form of preserved pollen grains. These findings show that bumble bees were already among the most important pollinators of linden (or lime/basswood) trees millions of years ago—just as they are today.