BBC

Scientists make artificial nerve cells, paving the way for new ways to repair the human brain.

Climate activist Greta Thunberg said that adults should stop making young people "angry" over global warming.

WWF and the Prado Museum join forces to raise the alarm during the COP25 summit in Madrid.

More than half of US national parks are threatened by invasive animals, like pythons and feral pigs.

Footage of a bear inscribed with "T-34" - the name of an iconic Soviet tank - is shared in Russia.

Provisional data suggests the decade from 2010-2019 is the warmest yet recorded.

Nasa credited an Indian engineer, Shanmuga Subramanian, with helping locate the site of the debris.

Potent chemicals are unwittingly passed down from mother to calf, according to a UK study.

As the UN has its annual climate change conference, we look at what it's for and if it ever makes a difference.

The Malagasy tree boa is under threat from poaching and fires.

The tiger has traversed 1,300km in five months, the furthest a big cat is known to have walked in India.

The notion that thinning ice shelves enable glacier speed-up and mass loss is cemented.

Almost 200 countries are meeting in Madrid to discuss what they're doing to tackle climate change.

Politicians and diplomats meet in Spain as scientists and charities say urgent steps are needed.

The foam is said to be caused by pollutants in sewage mixing with sea water and frothed by waves.

Fishing nets and rope were among the debris found inside the whale which stranded on the Isle of Harris.

Delegates from almost 200 countries meet in the Spanish capital on Monday.

Henrik Stiesdal has been thinking about wind turbines since he was a teenager.

The new fruit took US scientists two decades to develop and the launch cost $10m (£7.9m).

Fifteen-year-old Cheikh Bamba Diaby got into robotics after he had to unblock his sister's mobile phone.