Nasa is aiming to get closer to the Sun than ever before, with plans to plunge a car-sized unmanned spacecraft into the star's outer atmosphere.

Israeli scientists believe they have identified why Arabic is particularly hard to learn to read.

The re-introduction of wolves to a US National Park has not helped re-establish quaking aspens, as many researchers had hoped.

Ultrafine measurements of atmospheric gases could help scientists track down the last sources of CFCs thought to be slowing the recovery of the ozone layer.