Could clouds of alien life forms sweeping through outer space infect planets with life?

Did we start in a puddle here on Earth or come from space?

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.