Presented by National Geographic Society in partnership with Rolex. Some of the most important clues about climate change are beneath the ice. National Geographic Explorer and microbial oceanographer Allison Fong studies the microbes that make up polar food webs and how warming temperatures are reshaping ecosystems in the Arctic and Antarctic. Her work offers insight into which species may flourish—and which may struggle—as the poles continue to transform. Rolex and the National Geographic Society are partnering on science-based expeditions to explore, study, and document change in the planet’s unique regions. Discover more about Allison Fong’s research at the link in bio. #PerpetualPlanet Photograph by Esther Horvath estherhorvath