It's a question that has focused the minds of astronauts, scientists, space entrepreneurs and enthusiasts alike – is there, could there be, life on Mars? The race is on to find out, with NASA hoping to land astronauts there by the late 2030s.

Folk legend Eric Bogle is opening up and talks about his life, his thoughts about death, friendship and love and why having a deeper message for writing songs is so much more important than money and fame. It's a rare opportunity to share a conversation with one of the best and most prolific...