BBC News

Polar bears are working harder just to stay in one place, as the Arctic sea-ice on which they hunt drifts away.

Claire Marshall explains how fracking could be done in national parks.

Increases have been agreed for the UK fishing industry in quotas for fish including North Sea cod at annual EU negotiations.

Aeroplanes may be making a high-altitude icy haze that is brightening US skies, according to a group of scientists.

What Tim Peake means for British space ambitions

Thermal footage reveals how hummingbirds lose heat as they beat their wings up to 70 times per second.

UK pupils are being offered the chance to speak to astronaut Tim Peake by video-link next year, during his six-month mission around the Earth.

UK astronaut Tim Peake boards the International Space Station, which will be his home for the next six months, after a six-hour flight through space.

UK astronaut Tim Peake boards the International Space Station, which will be his home for the next six months.

MEPs reject new EU standards for diesel car emissions, arguing that they are not tough enough.

Head of the European Astronaut Centre, Frank de Winne, reacts to witnessing the British astronaut's departure for the International Space Station.

The success of clean air legislation in western developed countries is evident in a 10-year satellite study that tracks big declines of the pollutant nitrogen dioxide.

More than three-quarters of the UK's butterflies have declined in the past 40 years, according to scientists.

An American satellite stationed a million miles from Earth has obtained a unique view of a lunar eclipse.

Scientists have been scanning the command capsule of Apollo 11 in an effort to give the public a virtual experience of what it was like inside.

The American DSCOVR satellite stationed a million miles from Earth obtains a unique view of September's lunar eclipse.

There is a new X Prize that challenges teams to map a 4km-deep, 500-sq-km area of sea floor using autonomous robots.

Sarah Rainsford reports as British astronaut Tim Peake prepares to blast off to the International Space Station.

What does the climate deal mean for me?

British astronaut Tim Peake told reporters how he would be spending Christmas on the International Space Station

UK astronaut Tim Peake says the thing he is looking forward to most on his spaceflight is the view of Earth.

Sarah Rainsford speaks to Russian cosmonaut Gennady Padalka, who spent a record 879 days in orbit.

The rocket that will carry UK astronaut Tim Peake into orbit has arrived at the launch pad in Baikonur, Kazakhstan.

The BBC's Roger Harrabin on how the landmark agreement in Paris took shape in the final hours

The rocket that will carry UK astronaut Tim Peake into orbit has arrived at the launch pad in Baikonur, Kazakhstan.

A deal to attempt to limit the rise in global temperatures to less than 2C has been agreed at the climate change summit in Paris after two weeks of negotiations.

The Soyuz space craft which British astronaut Tim Peake will use for his mission to the International Space Station is delivered to the launch site in Khazakstan.

President Obama says the Paris climate deal is "the best chance we have to save the one planet we have", as China and India also hail the accord.

A landmark agreement designed to limit global temperature rise to less than 2C (3.6F) is adopted by nearly 200 nations at a UN climate summit in Paris.

Key negotiating blocs in Paris, including the G77, and nations such as China and India have indicated they will support the UN's draft climate agreement.

The Russian Space Agency has finished assembling the space vehicle that will blast UK astronaut Tim Peake into orbit.

France's Laurent Fabius says new climate draft would be legally binding and aims to keep temperature rises 'well below 2C'

Organisers of climate talks in Paris say a final draft text has been reached after nearly two weeks of intensive negotiations.

A look at the life of Yuri Gagarin, ahead of Tim Peake becoming the first British astronaut in space.

Negotiators in Paris work through the night in an effort to secure a new global climate deal, amid hopes that a final draft will be agreed by Saturday morning.

Climate deal negotiators have been working through a third night in Paris, with those also attending including activists, journalists and scientists.

A German nuclear fusion experiment produces a special super-hot gas which scientists hope will eventually lead to clean, cheap energy.

Negotiators at the Paris climate summit aim to wrap up a global agreement on Saturday with the French hosts "optimistic" of a deal.

A seal with a deep neck wound may have to wait for treatment because vets do not want to approach him during the breeding season.

Film makers William Davies and Hereward Holland join a World Wildlife Fund expedition in Mongolia, to see what can be done to protect and conserve the snow leopard.

Humans may have to turn to insects as a major source of protein if political efforts to halt climate change fail.

Three important issues remain the toughest for UN negotiators working on a global climate agreement.

With agreement on a climate change deal still looking some way off, the BBC’s environment correspondent Matt McGrath explains how the conference is divided into many, often over-lapping, factions.

Paignton Zoo's 28-stone silverback Western Lowland gorilla, Pertinax, has had a root canal operation.

The high-pitched mating chirp of a group of crickets may have evolved from the insects impersonating predators, scientists say.

The United States has joined with a range of rich and poor countries at COP21 in an effort to secure a final agreement.

A rare Philippine eagle chick has hatched in captivity, giving conservationists hope for the critically endangered bird.

The world's first litter of "test tube" puppies has been born, paving the way for conserving endangered breeds and boosting efforts to fight human diseases, US scientists say.