Cloning has long been a fixture in sci-fi films but there's a real industry that's been developing over the past 20 years with many people now choosing to clone their prized animals. So what actually happens in the cloning process and does the rise of animal cloning mean we're just one step away from cloning humans?

Twenty Thousand Hertz: Make sure you check out the amazing Twenty Thousand Hertz podcast which explores some of the world's most recognisable sounds. Just search for Twenty Thousand Hertz in your favourite podcast player, or visit: 20k.org.

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