Erik Wurz (L), Instructor and Coordinator of the Polar Scientific Diving program, shows participants how to collect underwater ice samples by drilling manually prior to a dive 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)

Participants in the Polar Scientific Diving program prepare 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 emerges 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)

Instructor and Coordinator of the Polar Scientific Diving program Erik Wurz (R) of Germany prepares a safety diver who is on standby in case of an emergency under the ice during 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 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 diving site of the Polar Scientific Diving program near 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 Jonathan KLEIN / AFP via Getty Images)

This aerial view shows the Finnish Kilpisjaervi Biological Station, home 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)

A participant in the Polar Scientific Diving program emerges 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 Jonathan KLEIN / AFP via Getty Images)