A lost 1966 Muhammad Ali interview during which the boxing legend chatted about fighting on Mars has been unearthed as part of a new archive-searching venture.

Documentarian and journalist Michael Aisner was 17 when he was granted an audience with the champion for his Illinois high school radio station. The chat aired once and was then locked away by the interviewer.

When he heard of the new Tumblr.com/brandonbrand.com project, he dug out the radio moment he had with Ali and now the interview has been posted online.

As well as talking about his start in boxing and his work-out regime, Ali also tells Aisner he dreams of becoming the first boxer to fight a Martian on Mars.

He says, "We estimate our time in getting there will be about 10 years... I'll be 10 years older but I'll still be in good shape. I expect the fight to go about 12 seconds. I'm fighting the green giant up there.

"After knocking him out, I hope to be back on earth in about 1986."