Doctors say they have made a breakthrough in helping women who had a very early menopause to have children, with one baby born and another expected.

The Cassini probe detects propene - a common constituent of common Earth plastics - on Saturn's moon Titan.

Astronomers have created the first map of the clouds on a planet outside our Solar System.

Illegal drugs are now cheaper and purer than at any time over the last 20 years, suggesting the global "war on drugs" has failed, researchers warn.

Flowering plants may have originated more than 100 million years earlier than previously thought, scientists suggest.