Thanks to TV show Brainiac, we can get a very dramatic demonstration of how custard changes shape under pressure.

The lenses in your eyes suffer from chromatic aberration. the brain tries to edit this out, but sometimes the effect is too strong.

Can't believe those squares are the same shade of grey? This animation simply moves square A to square B.

The Crookes radiometer is a very neat scientific toy. The paddles inside the glass bulb move when the radiometer is exposed to light.

Sound starts by compressing the air, squashing it up. This sends a series of 'longitudinal' waves of compressions and stretches through the air.

We are used to optical illusions, but less familiar with auditory illusions - yet it is entirely possible to fool the brain about what it is hearing.

By making use of quantum tunnelling, a signal can be sent faster than the speed of light, as demonstrated in this recording.

The idea of there being separate left and right brain functions can seem very artificial, but this experiment brings it to life.

Memory and observation are essential to everyday existence - an when used to give evidence in court can make the difference between guilt and innocence.

Is there such a thing as artificial intelligence? Could you definitely tell if it was a person or a computer that was replying to your short messages? Give it a try.