Ethiopia starts diverting a stretch of the Blue Nile to make way for a dam that has caused a dispute with countries downstream, state media say.

New synthetic drugs are emerging at an ever faster rate in Europe, says the EU's drug agency, with legal highs increasingly being shipped into the EU from Asia.

The potential risks of genetically modified fish escaping into the wild are highlighted in a new study.

The University of Bologna in Italy finds what it says may be the oldest complete scroll of Judaism's most important text, the Torah, in its library.

The first vaccine which protects children against hand, foot and mouth disease has been reported by scientists in China.

Chinese hackers have gained access to designs for more than two dozen US weapons systems, a US newspaper reports.

People having planned surgery at the end of the week are more likely to die than those having operations at the beginning of the week, research suggests.

A tiny species of amphibian that lived alongside dinosaurs is discovered by scientists on the Isle of Wight.