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Ever wondered how your body knows left from right? Why our bodies are asymmetrical on the inside, despite being so symmetrical on the outside? 

And why on Earth does singer Donny Osmond, like 1 in 20,000 people, have mirror-image inverted organs?

In this video, part 3 of my special series on how our bodies evolved to look the way that they do, find out the science of your asymmetry.

Watch below: