The latest stories from the Science & Environment section of the BBC News web site.
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A farmer explains his relationship with his sheepdog, after researchers help unravel the mystery of how the animals do their job.
Scientists produce a simple mathematical model that explains how a single sheepdog can herd a large number of sheep.
The climate impacts of the world's fossil-fuelled power plants are being underestimated because of poor accounting, say researchers.
A target number of badgers to be killed in this year's pilot cull to tackle tuberculosis in cattle is announced.
What pinpointing positions on the planet could mean for you
The world's rarest bird is facing extinction unless it finds a new home, say conservationists
The European Space Agency releases time-lapse footage of the Aurora Australis, or southern lights, filmed from the International Space Station.
Measuring and tackling an invisible killer
Harvard researchers develop a system to orientate small objects in any direction using magnetic levitation.
The last remaining population of the world's rarest bird, the Madagascar pochard, needs a new wetland home if it is to thrive again, a study reveals.
Europe's Rosetta mission, which aims to put a robot on a comet in November, has identified five potential sites for the touchdown.
A whole functional organ has been grown from scratch inside an animal for the first time, say researchers in Scotland.
Researchers say they have discovered more than 500 bubbling methane vents on the seafloor off the US east coast.
New atlas catalogues 9,000 Southern Ocean species
Iceland lowers the warning level to aviation from the Bardarbunga volcano, but say an eruption "cannot be excluded".
The National Zoo in Washington DC has been celebrating panda cub Bao Bao's first birthday.
Warning over electrical brain stimulation
Iceland issues a red alert to the aviation industry for the Bardarbunga volcano, meaning significant ash emissions are likely.
Iceland closes part of its airspace after indications that an eruption has occurred under the country's biggest glacier, but airports remain open.
The European Space Agency says the latest two satellites for Europe's version of the US GPS sat-nav system have not gone into the correct orbit.