5. Glacier

Robert Macfarlane discovers various worlds beneath our feet.

This time he heads to the ice mass of the Knud Rasmussen glacier:

"An hour short of dusk on the evening of our arrival, the fog bank disperses to reveal the calving face of the glacier..."

But what is meant by 'calving', exactly?

Concluded by the author.

Abridged by Katrin Williams.

Producer Duncan Minshull.

First broadcast on BBC Radio 4 in May 2019.