Once you've wrapped up this podcast, how about trying a very British cult?

What happens if the person you trust with your future isn't what you think they are?

I did feel the whole time he was watching me Yeti. I saw a footprint and that really gave me gusmas.

Or people who knew me. Emme, I remember every secret, every lie. I'm the only one who knows the truth.

Discover more of our biggest podcast from 2003.

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Decades before scientists at Edinburgh University

cloned Dolly the Sheep, another British scientist,

Professor John Gerden, cloned a frog.

Working in his lab in Cambridge in the early 60s, John developed the techniques and some of the

tools that have since been used to clone not just Dolly the sheep, but mice, cats, goats and cows.

Even a wild ox called Noah rescued from the brink of extinction.

And this year, a full half a century later,

he was awarded the Nobel Prize for physiology or medicine

together with Shinya Yamanaka.

Dolly the sheep hogged the news headlines in 1997, but John Gurdon got there first, cloning a frog

from an adult cell over three decades earlier, less cuddly perhaps but proof of principle nevertheless.

Long before people talked about stem cells, he showed that all cells,

whether they are skin, heart, nerve cells, or in the case of his frog, from the intestines, contain all the genetic

information they need to become, well, absolutely anything.

And in so doing, he raised the possibility that scientists might one day be able to turn back time,

...