BBC

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.

Scientists in Italy have discovered how our brains can be tricked into feeling disembodied from our own limbs.

The eggs of a mosquito capable of transmitting tropical diseases, including the Zika virus, are found for the first time in the UK.

Voles appear to have been roasted for food by Neolithic people living on Orkney 5,000 years ago, archaeological evidence shows.

The European Space Agency is still waiting for confirmation that its Schiaparelli probe has landed on Mars.

Cave art from the Ice Age has helped solve the origins of Europe's largest land mammal - the modern European bison.

A pair of astronauts have entered China's Tiangong 2 space station as they begin the country's longest manned space mission.

Europe’s Schiaparelli robot will soon attempt the risky descent to the surface of Mars, after a 500 million km journey from Earth.

Two Chinese astronauts have docked with the Tiangong 2 space lab, where they will live for the next 30 days conducting experiments.

BBC science reporter Victoria Gill explains what the European mission to Mars is hoping to find out.

An orangutan pictured climbing high into a tree to reach some figs has taken the top honour in the 2016 Wildlife Photographer of the Year competition.

Milk from Tasmanian devils could offer up a useful weapon against antibiotic-resistant superbugs, according to Australian researchers.

The global farming sector has a big role to play in the effort to curb greenhouse gas emissions and adapting to future climate change, the UN says.

Peru's environmental agency is investigating the deaths of some 10,000 frogs whose bodies have been found in a tributary of the Titicaca lake.

Horse chestnut trees are being attacked by a combination of pests and diseases which could cause the conker to vanish

The UK’s favourite new yellow submarine, Boaty McBoatface, will likely take on the grand challenge of trying to cross the entire Arctic Ocean under the ice.