A ridiculous number of science-fiction TV series and films have moments where characters exchange minds, from the brilliance of Quantum Leap to the latest season of Heroes. Body-swapping is such a staple of imaginative fiction that it's tempting to think that it has no place being scientifically investigated. But Valeria Petkova and Henrik Ehrsson beg to differ - while actually exchanging minds is clearly impossible, these two scientists have created an illusion that can make people feel that another body - be it a mannequin or an actual person - is really theirs.
The idea that our bodies…
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