Oulanka National Park, FinlandSampling excursion in Syöte, Finland.Group excursion at the coast near Longyearbyen in Svalbard.Koli National Park, FinlandeDNA water samplingIn the lab: Gerrit Wehrenberg, Angelika Kiebler & Stefan Prost.Siberian flying squirrel in Lapua, Finland. © Pekka TakamaaGerrit Wehrenberg and Jan Mutter collecting genetic samples from Galápagos giant tortoises at Zürich Zoo, Switzerland. Photo: Tim…