A court in Brazil rules in favour of the company behind a multi-billion dollar dam project, allowing work on the Belo Monte dam to go ahead.

Four people die and around 50 are missing after an oil drilling rig capsizes and sinks under tow in freezing seas in the Russian far east.

Exposure to sunlight may help impede the spread of chickenpox, claim researchers.

Experts warn the future of English mistletoe is still under threat two years after a campaign began to save it.

Fossils said to be more than 450 million years old and of a kind never discovered before have been uncovered at a quarry in Powys.

Scientists assemble a remarkable 140-year record of water quality in the River Thames that details the inexorable rise of nitrate pollution.

Experts say they have confirmed for the first time the precise origin in west Wales of some of the rocks at Stonehenge.

Scientists catch a rare glimpse of the elusive pygmy hippo in Liberia.