The sea beneath Arctic and Antarctic ice holds many secrets. These scientists dive deep to find out

KILPISJÄRVI, Finland (AP) — As bubbles rippled across the frigid Finnish lake, diver Daan Jacobs emerged from a hole carved out of the thick, crackling ice.

The journey had taken him 8 meters (26 feet) beneath the surface, where sunlight filtered through the Arctic ice and fish swam around a rock formation. It’s a remote place few will ever see, especially in winter, when snow blankets the ice and temperatures on land approach minus 40 degrees in both Celsius and Fahrenheit.

But Jacobs...