BBC News

South Korea's dogs have to go for walkies in some of the worst air in the developed world.

Engineers in Canada have devised a machine they say can clean small pieces of plastic from Hawaii's "Trash Beach".

Snow may have caused travel issues in Australia, but these Tasmanian Devils have had fun.

A proposed European Union satellite mission could have major benefits for agriculture.

The US space agency says it will allow tourists to visit the station from 2020.

Antarctic glaciers are named after the spacecraft that revolutionised our understanding of the continent.

Special protections are planned for minke whales and basking sharks in their feeding grounds around Scotland.

Animals have long been used for military purposes, but could marine creatures also act as sensors?

The chancellor warns the PM that reducing greenhouse gas emissions to net zero by 2050 could lower public spending.

A carving believed to be about 12,000 years old has been discovered in south-western France.

The technology is designed to cut down queues, and lose the annoyance of removing liquids from bags.

Scientists studied elite events, including a 3,000 mile run and the Tour de France.

New York might become the first US state to ban cat declawing - but it's been illegal in Europe for years.

UK bills are inflated partly because households are subsidising nuclear submarines, MPs are told.

The president's views appeared unchanged after meeting environmentalist Prince Charles.

How an RAF squadron on a Scottish island helped to get weather data that saved the D-Day landings.

China, Indonesia and Vietnam are among the worst polluters for plastic waste being dumped in the ocean. Meet the women in those countries trying to change that.

An invasive "killer shrimp" that has reached UK rivers could be altering the behaviour of other species.

It is packed with millions of living cells to mend damage after a heart attack, say researchers.

This Mexican researcher hopes her invention can help replace single-use plastics.

The BBC was given access inside Porton Down, where some of the world's deadliest viruses are researched.

Twin girls had their DNA altered to protect against HIV - but their mutation may increase the risk of an early death.

Theresa May will raise the issue of climate change with Donald Trump during his upcoming visit to the UK.

The proposed motorway has been called an "attack on nature" by some and a "godsend" by others.

Have we found some of the technologies that can finally help us survey Earth's unknown depths?

The TechDemoSat spacecraft deploys a large membrane to pull itself out of the sky.

The country has not used coal to generate electricity since 17 May, the longest period since the 1880s,

The Philippines says the rubbish was falsely labelled as plastic recycling when it was sent in 2014.

Climate scientists ask Theresa May to make her "legacy" a target to cut greenhouse gases to zero.

A fungus has been genetically modified with spider venom to kill the mosquitoes that spread malaria.

Exported waste, intended for recycling, is being sent back to Canada by the Philippines.

Day-to-day operation of the Rosalind Franklin Mars rover will be run out of a facility in Turin.

Climate change played a role in the deaths of thousands of puffins in Alaska, according to a study.

£20bn boost is needed to achieve the government's vision of a science-led economy, according to a study.

The country's government says it has become a dumping ground for wealthier nations.

The future of the critically endangered Sumatran rhino has been struck a blow, with the death of Malaysia's last male.

Steve Biro snapped the picture of 'Bruce' the bald eagle at a raptor conservation centre in Canada.

Overcrowding is blamed for an increase in deaths on the world's highest peak, but other factors are at play.

Millions of people in Great Britain live more than a 10-minute walk away from their nearest park or green space, a study calculates.

Scientists want thousands of volunteers to help record sightings of "spittle" and spittlebugs across the UK.

BBC's Megha Mohan finds out why voice assistant technologies often have female voices.

Young people all over the world are walking out of school in protest of climate change - and Belfast is no different.

Seven have died climbing the world's highest peak in a week - more than for the whole of last year.

From Australia to Europe, school children are skipping classes to call for action on climate change.

A Falcon-9 rocket launches from Florida, packed with 60 satellites capable of giving users on the ground high-speed connections to the internet.

The California firm launches the first spacecraft in its multi-billion-dollar broadband project.

You sent us thousands of questions about climate change. Here are some answers to the most common.