
“Now it’s going to get dark. Very fast.”
The words echoed around the bug-eyed, Sputnik-like capsule as we descended into an afterworld of silence. The sensation – of snowy mountains fading away and sunlight draining from the scene, turning it into a grainy lithograph – set my pulse racing and soon our tiny craft was floating in slow motion in an out-of-focus softness, at minus-70m, near the bottom of one of the deepest lakes in Europe.