The latest stories from the Science & Environment section of the BBC News web site.
Updated: 1 hour 8 min ago
£135,000 was spent relocating water voles so work could begin dredging two Somerset rivers in 2014.
The short circuit delaying the restart of the Large Hadron Collider has been fixed, after a blast of high current melted the metal particle responsible.
The US has pledged to tackle climate change by cutting its carbon emissions 26-28% by 2025.
New renewable generating capacity broke the 100GW barrier in 2014, equivalent to the entire fleet of nuclear power plants in the US, a UN report shows.
A study finds that ants on board the International Space Station still use teamwork to search new areas, despite falling off the walls of their containers for up to eight seconds.
Fossils from the ocean floor are yielding clues to the Indian monsoon millions of years ago.
Researchers at the Smithsonian Institution in Washington say whale communication depends on jaw movements and the methods these mammals use to catch food.
Is fibre key to connecting Africa?
A new multimillion dollar project that uses solar power to treat underground saline water is offering a ray of hope in south east Pakistan.
Solar Impulse, the fuel-free aeroplane, lands in Chongqing, China, to complete leg five of its attempt to fly around the world.
The mystery of Mercury's dark surface can be explained by a steady dusting of carbon from passing comets, research suggests.
A 1,000-year-old treatment for eye infections could hold the key to killing antibiotic-resistant superbugs, scientists say.
Researchers in Denmark have discovered that porpoises can adjust the beams of sound they use to hunt.
Porpoises finely adjust the size of the beams of sound they use to hunt - using sound like a searchlight to trap their prey, a study finds.
The Solar Impulse 2 plane has departed from Mandalay in Myanmar as part of its round-the-world flight, Kasia Madera reports
A light bulb made with graphene - said by its UK developers to be the first commercially viable consumer product using the super-strong carbon - is to go on sale later this year.
A Russian Soyuz spacecraft has docked at the International Space Station carrying three astronauts, two of whom are due to spend a record 12 months there.
US astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko arrive for a 12-month tour of duty on the International Space Station.
What are the justifications for the £4bn Large Hadron Collider?
What drives people to murder-suicide?