A new analysis sheds light on the most likely route for the Carthaginian general’s famous crossing of the Alps. The study, led by the German Centre for Integrative Biodiversity Research (iDiv), the Friedrich Schiller University Jena, and the University of Oxford, reveals that the Col de la Traversette would have provided the most energy-efficient route. The findings have been published in Proceedings of the National Academy of Sciences (PNAS).