BBC

Tourists gather in Transylvania to help with the traditional mountain hay harvest. BBC Gaelic Journalist Teàrlach Quinnell went with them.

Most countries in the world have little capacity to deal effectively with invasive species, a study suggests.

There has been a massive spike in the amount of recycling that gets rejected.

Badger culls are to be carried out in five new areas of England in a bid to control bovine TB, the BBC learns.

Archaeologists have uncovered a mysterious stone structure buried under what they describe as Scotland's "largest Neolithic rubbish dump".

Spider silk is used to create a superlens for a microscope, allowing Bangor University scientists to view objects previously deemed "invisible".

Firefighters in California gain ground in tackling the massive Blue Cut wildfire, containing around 40% and allowing many evacuees to return home.

A study finds that Australian zebra finches sing to their eggs in hot conditions and these "incubation calls" change the chicks' development.

About 100 voles will soon be released in the Yorkshire Dales in what is thought to be Britain's largest water vole reintroduction project.

The sunken wreck of a fishing trawler that swept for mines during World War One is given special protection by Historic England.

Researchers have combined satellite imagery with AI to predict areas of poverty across the world.

Tourists flock to Hawaii's Kilauea volcano after lava reached the sea for the first time in three years. Aerials - Lava Ocean Tours.

A global audience joins Prof Michael Sandel to discuss the world's response to climate change.

Australian researchers are investigating if the scent of giant sea snails could help repel millions of coral-eating starfish from the Great Barrier Reef.

A new analysis shows that Oetzi the Iceman's clothes came from at least five species of animal, including a hat of brown bear fur.

A satellite tag fitted to a hen harrier has stopped transmitting in the same mountains where eight tagged eagles "vanished", says RSPB Scotland.

Astronomers capture rare images of a white dwarf - before, during and after it exploded as a "classical nova".

Scientists have identified a new species of dolphin that lived 25 million years ago.

In its vision for the future of post-Brexit agriculture the Campaign to Protect Rural England says too much money is given to large-scale farms.

The large-scale, long-term decline in wild bees across England has been linked to the use of neonicotinoid insecticides by a new study.