The latest stories from the Science & Environment section of the BBC News web site.
Updated: 11 min 20 sec ago
Could an algorithm help you find true love?
The UK's three main political leaders make a pledge to work together to combat climate change, whatever the election result.
Space agency Nasa has released a time-lapse video showing the Sun over period of nearly five years - capturing one frame every eight hours.
UN climate talks in Geneva have ended with agreement on a draft text for a new climate agreement to be discussed in Paris in December.
After Scientists said that they want to send messages to aliens - BBC World viewers have their say on what they would tell extraterrestrial life.
Our digital data, such as photos and documents, could be lost forever if we are unable to find ways of preserving old formats while new technologies take hold.
Millions of us routinely upload photos and other personal information onto the internet, believing it will stay safe and be easily accessible.
Ultrasound images of a baby pygmy hippopotamus kicking inside its mother's womb have been released by Melbourne Zoo.
Vint Cerf, a "father of the internet", says a way must be found to stop all our images and documents being lost through technological obsolescence.
The Bass Rock in the Firth of Forth now has the world's largest colony of gannets following a count by experts.
Why this 24-year-old wants a one-way trip
More than 30 British insect species have been classified as in danger of extinction, due to pollution and habitat loss.
The American south-west and central plains may be on course for droughts the like of which they have not seen in over a 1,000 years, scientists say.
About eight million tonnes of plastic waste find their way into the world's oceans each year, a new scientific assessment suggests.
Scientists at a US conference in say the time has come to try actively to make contact with intelligent life on other worlds.
Dogs can tell the difference between happy and angry human facial expressions, a study suggests.
Carbon dioxide escaping from the depths of the ocean heralded the end of the last Ice Age, a study suggests.
Early results from a major count of farmland birds reveal sightings of several rare species.
Making new art from old in a Nobel Prize winner's lab
Sao Paulo's water crisis hobbles Brazilian business