Psychologists subject six volunteers to a world without stimulation.

Take a look at how 48 hours of confinement affected the volunteers.

See what life is like at a solitary confinement prison.

Brian talks about his captivity and time in isolation.

Find out how you would fare in total isolation.

Watch selected clips from the TV programme.

A Hostage's story by Brian Keenan.

Profile: Guantanamo bay

The search for alien life is 50 years old, but a planet has been discovered that could support life.

Prof. Regan tests the scientific claims of supermarket products

A few isolated communities seem to hold the secrets to long life.

Lifting the lid on the business of human choices in an exclusive guide to making better decisions.