Belgian toxicologist Laura Pirard (R), who specialises in marine mammals, tests the 'Slice' method on polar bear adipose tissue biopsies, with Finnnish toxicologist specialising in marine mammals, Heli Routti (L), in a laboratory onboard the science icebreaking vessel 'Kronprins Haakon' while sailing in eastern Spitzbergen, in the Svalbard archipelago, on April 6, 2025. The Norwegian Polar Institute, an Arctic research organisation, organised a five-week expedition aboard the high-tech research vessel and icebreaker Kronprins Haakon to collect adipose tissue biopsies and blood samples from polar bears in order to study the impact of pollutants on their health. (Photo by Olivier MORIN / AFP via Getty Images)