Could Professor Jose Torero's fire protection system have saved the Twin Towers?

Can computers be trusted to save lives in an emergency? Vote now

Leslie Robertson shares his experience of 9/11

Watch a short version of the programme

Using computing power to tackle infernos

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.