BBC

One of the most demonised patients in history - Gaetan Dugas - has been convincingly cleared of reports he spread HIV to the US, say scientists.

A $100m initiative to listen for radio signals from aliens is targeting a star with an unusual dimming pattern.

Scientists are planning to release millions of modified mosquitoes in urban areas of Brazil and Colombia, in an effort to tackle Zika, dengue and chikungunya viruses.

A Dundee-born scientist dies in Antarctica after the snowmobile he was driving fell into a crevasse.

Millions of pounds are being spent unblocking drains all because of wet wipes being flushed down the toilet.

Training mums and dads as "super parents" can dramatically improve a child's autism, a study shows.

A parrot fossil has been discovered in Siberia - the furthest north these birds have ever been found.

The Prince of Wales is joining an Anglo-French initiative to improve the condition of the world's soils.

Scientists have carried out their first test flight of a project to measure UK air pollution from the air.

The International Energy Agency says that the world's capacity to generate electricity from renewable sources has now overtaken coal.

Science Minister Jo Johnson and Prof Martyn Poliakoff mix politics and science to look at carbon dioxide and the acidification of oceans.

The mysterious hexagon at Saturn's northern pole has changed colour from blue to gold, scientists have said.

2016 is likely to be the first year in recorded history in which levels of CO2 in the atmosphere remain above the symbolically important threshold of 400 parts per million.

Canadian scientists use drones to capture rare whale footage in the Arctic.

The gouge in the ground likely made by Europe's Schiaparelli probe as it hit the surface of Mars on Wednesday has been imaged by an American satellite.

UN Secretary General Ban Ki-moon tells the world's mayors they face making 'tough decisions' to ensure future generations live in a safe and sustainable urban world.

Hundreds of snow leopards are being poached in retaliation for livestock losses every year across the high mountain ranges of Asia, says a new report.

Some of the giants of the dinosaur family may have arisen in South America and crossed over Antarctica to Australia about 100 million years ago, new fossil evidence suggests.

Scores of spectacular and rare undersea species have been found on expeditions to some of the deepest trenches in the Pacific Ocean.

Europe's Schiaparelli lander did not behave as expected as it headed down to the surface of Mars on Wednesday, data shows.