The latest stories from the Science & Environment section of the BBC News web site.
Updated: 1 hour 40 min ago
Can the smell of the sea cool the Earth?
Scotland's salmon farming industry has begun farming a new type of fish, specifically to keep salmon clean.
Asda is to increase the price it pays its milk supplier to "a level that will assist farmers during the current crisis", the supermarket says.
A UK museum says it may hold Zimbabwean human remains, but cannot confirm if they are the "skulls of beheaded heroes" referred to by President Mugabe.
Comet 67P has passed the closest point to the Sun in its 6.5-year orbit, with the Rosetta spacecraft still in orbit around it.
Stargazers captured the dazzling display of the annual Perseid meteor shower as it reached its peak on Wednesday night. BBC News viewers sent in their photos.
The force of the explosions in the Chinese port city of Tianjin were so vast they "alarmed" China's National Earthquake Network.
The annual Perseid meteor shower reached its peak during the night, although weather spoilt viewing in some parts of the UK.
Environmental groups are angry at moves to give ministers the power to decide whether or not to approve applications for fracking if local authorities take too long.
Shale gas planning applications in England are to be fast-tracked under new government measures to crack down on councils that delay on making a decision.
A mass burial site that may contain 30 victims of the Great Plague is found underneath Liverpool Street station as part of Crossrail works.
One World Elephant day, the BBC is told how poaching could see the end of elephants in the wild by 2030.
A look at some of your photos of the Perseid meteor shower in 60 seconds.
The BBC's Pallab Ghosh explains why the Perseid meteor shower happens every year.
Arctic oil drilling may harm Shell's reputation and cost it dear, says the former BP boss Lord Browne, but Shell says the risks are manageable.
The figurehead from a 15th century ship, the Gribshunden, has been raised from the Baltic Sea near Ronneby, Sweden, more than 500 years after it sank.
Are Nasa's robotic spacecraft plans in trouble?
Researchers have developed a robot that can build "baby" robots that get progressively better at moving without any human intervention.
The first ever recordings from inside the human brain during REM sleep suggest that flickering eyes accompany "scene changes" in our dreams.
Engineers develop a robotic system that evolves and improves its performance.