Peter Hilary's most remarkable journey came when he guided Neil Armstrong to the North Pole.

Peter Hilary is an adventurer. He learnt to climb while roped to his father, Sir Edmund, while still a child.

He's climbed the highest mountains on all seven continents, including twice climbing Everest and trekked across Antarctica to the South Pole.

Probably his most remarkable journey though, came when he guided his father and Neil Armstrong (yes, he of the moon landing) to the North Pole - a two week adventure full of amazing conversation and scenery.

40 years after that historic landing on the moon, Peter told Lindy Burns about that fortnight in the presence of extraordinary men.

How did two of the greatest explorers in human history interact with each other?

What did they talk about and how did he think they were both able to deal with grace, the madness that greeted their respective achievements?