The latest stories from the Science & Environment section of the BBC News web site.
Updated: 19 min 59 sec ago
Operation Snow Tiger follows wild animal biologist Liz Bonnin and an international team of scientists on an expedition to Russia, documenting one of the world's rarest and most mysterious animals - the Siberian tiger.
North Sea cod stocks are improving, according to research by the Marine Stewardship Council (MSC).
North Sea cod stocks are on the road to sustainability, according to Marine Stewardship Council research.
In search of Valentina Tereshkova, the first woman in space
Schools are being urged to sign up for a codebreaking competition aimed at developing the next generation of cybersecurity experts.
A California nuclear power plant will close permanently amid doubts it can operate safely, 18 months after a small radiation leak was discovered.
Researchers find that some of the worst locations for accidents at sea are also some of the most environmentally sensitive areas.
A man from Dorset who found the fossil of what is thought to be most powerful creature ever - has had it officially named after him.
For a new BBC series about the continents, Prof Iain Stewart jumps into the waters of Victoria Falls, a 100m-high cascade in Africa.
Nepal's years-old plan to spread out mountaineering activities across its Himalayas has had little effect, experts say.
How a collision of ancient land-masses framed modern New York
A comet's extremely close encounter with the Sun gives scientists a look at a region never visited by spacecraft.
Endangered Siberian tigers filmed in the Russian Far East
Local communities in England are to be given more powers to block onshore wind farms, but also offered greater incentives to accept them.
New research sheds light on why some birds have lost their penises over the course of evolution.
It looks like Justin Bieber will be literally mingling with the stars - he's signed up to a trip to space.
Fossil evidence far older than any found before shows a Neanderthal living 120,000 years ago had a cancer that is common today.
Nasa is finally thinking about getting its Curiosity rover moving and heading towards the big mountain at its exploration site in Mars' Gale Crater.
Researchers have been able to trace the impact of volcanic eruptions on the climate over a 1,200 year period by assessing ancient Irish texts.
Radioactive water is leaking from a storage tank at Japan's tsunami-hit Fukushima power plant, following several other recent leaks and power failures.