This episode is sponsored by the Perception Census, a new groundbreaking study exploring

the fascinating potential of the mind from the creators of Dream Machine.

Here's a question.

Which is heavier?

Red?

Or yellow?

Now, did an answer come to mind instantly?

Most people say red, but why is that?

That's at the heart of what the Perception Census is aiming to discover.

To what extent are we all experiencing the world around us differently?

And why?

It's led by world-leading academics, professor of neuroscience, Annal Seth from the University

of Sussex.

You may have heard of.

He crops up on TV and radio.

He's always brilliant.

He wrote a fantastic book called Being You, which came out last year, and professor of

philosophy, Fiona McPherson from the University of Glasgow.

And the team has designed this brilliantly.

Basically, the more you complete, the more valuable the research becomes.

So just taking part is really engrossing.

They're all kinds of games, illusions, tests, brain teasers, as well as a little bit about

...