Mistle thrushes have disappeared from UK gardens at a "staggering" rate, according to the RSPB.

A Star Trek style 'tractor beam', which uses light to attract objects, is developed by scientists at the University of St Andrews.

A genetic study reveals that the origins of HIV can be traced back millions of years, rather than tens of thousands of years.

Researchers identify willow trees that can yield five times more sugar than ordinary varieties, "drastically reducing" the environmental impact of biofuels.