The latest stories from the Science & Environment section of the BBC News web site.
Updated: 15 min 47 sec ago
Could unused TV signal improve rural broadband?
Over the decades tonnes of disposed tents, spent oxygen cylinders and bottles have been left behind on Mount Everest by people trying to scale it. Now authorities are urging them to bring the waste back down with them to recycle it.
Rape-prevention tool draws online backlash from anti-rape advocates
Neuroscientists artificially turn a mouse's fearful memory into a positive one, and vice versa.
A pest controller takes on the "biggest job of his career" when he is called to deal with a nest of more than 5,000 wasps.
Ten groups have been chosen as finalists in a $10m (£6m) competition to develop a real-life "tricorder" - the medical scanner used in Star Trek.
California has been hit by its worst drought in a century and many say the problem is only going to get worse.
BBC Newsnight's Stephen Smith visits Dover to assess how much of a threat buddleia is to native species
Overnight earthquakes raise fears that magma from Iceland's Bardarbunga volcano could be heading towards another large volcanic system, scientists say.
Why so many of us are developing allergies
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.