Researchers haven't actually worked out how to carry out a real physical 'body swap' – not yet – but in this case, 33 pairs of friends were able to virtually swap bodies using headsets. As they looked round, they saw themselves in their friend's body.

The experiments only ran for a few minutes, but they showed that the pals very quickly felt like they were inhabiting each other's bodies – when one of the pair was threatened with a prop knife, the other would tend to break out in a sweat. What's more, participants quickly began to feel more like their friends rather than themselves, in measures such as talkativeness, cheerfulness and confidence. (1)

Who am I?

I am me.

You are you.

How funny.

I am sure you are you.

And yet.

For you thing means nothing.

The most simple of problems.

Hindering our thought.

Every day.

Every single moment.

The simplest of questions.

Who am I?

It is not the answer that we miss.

But the question we ask.

Who are you?