We often talk about missing the importance of the journey when we’re too focused on the destination, but what if that journey is commanding a flight to the International Space Station, or swimming 108 miles from Havana, Cuba, to Key West, Florida?

This week, I was lucky enough to speak with two awe-inspiring people about the physical and mental challenges of their incredible journeys.

I talk to Commander Chris Hadfield, the first Canadian to walk in space, who made history in 2013 with his five month stint aboard the International Space Station. What followed was a best-selling book, An Astronaut’s Guide to Life on Earth, and possibly an even better known video – his version of David Bowie’s ‘Space Oddity,’ performed and filmed on the Space Station.

I also speak to the remarkable Diana Nyad, a world record-holding marathon swimmer, who after five attempts over 35 years, swam from Cuba to Florida at the age of 63. Diana’s book, Find A Way, is out now.