The latest stories from the Science & Environment section of the BBC News web site.
Updated: 9 min 50 sec ago
Scientists say that grime on urban surfaces does not absorb and lock away nitrogen gases - it re-releases them when hit by sunlight.
Botanists in the US say an ancient plant that grew underwater in what is modern day Europe may have been the world's first known flowering plant.
Oil and gas giant Shell has been granted the final permit it needs to begin drilling below the ocean floor for oil in the Arctic.
A mass grave containing at least 26 skeletons is further evidence of the brutal conflict that appears to have beset central Europe 7,000 years ago.
London-based Inmarsat sets a launch date for the third of its next-generation spacecraft, allowing it to complete its £1bn Global Xpress network - the UK's biggest commercial space venture.
Working out what is necessary for life
Field trials show a so-called "drinkable book" can kill bacteria in drinking water, thanks to metal nanoparticles embedded in its pages.
Nasa astronaut Scott Kelly captures timelapse footage of Aurora Borealis, also known as the Northern Lights, from the International Space Station.
Forty years since weather symbols were introduced to BBC forecasts, BBC Weather's John Hammond looks back at the evolution of how the corporation has presented the weather.
A planet 100 light-years away resembles a young version of Jupiter, astronomers say.
Climate change is increasing the risk of severe 'food shocks' where crops fail and prices of staples rise rapidly.
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.