The sun shines through the clouds over the frozen lake at the Kilpisjaervi Biological Station in Finland, on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program prepares an ice hole, or maina, prior to a diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program is lifted out of the water by colleagues after a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program has her goggles adjusted by a colleague before a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program is lifted out of the water by colleagues after a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program enters the water for a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program enters the water for a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

This aerial view shows the Kilpisjaervi Biological Station in Finland (L) and the diving site (R) of the Polar Scientific Diving program, on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by Jonathan KLEIN / AFP via Getty Images)