The latest stories from the Science & Environment section of the BBC News web site.
Updated: 8 min 13 sec ago
Astronomers may have discovered the chemical signature of one of the Universe's earliest stars.
One of the US aid workers who recovered from the Ebola virus says he is "thrilled to be alive" as he and another patient are discharged from hospital.
Nasa's Curiosity rover looks to examine another sample of Martian rock, but its drill test in a slab dubbed "Bonanza King" fails to complete properly.
Sri Lanka tree barrier could prevent conflict
A British defence firm is working on technology that will give aircraft a "skin" of sensors, allowing it to feel in a similar way to humans.
Scientists determine the comet being followed by Europe's Rosetta spacecraft to have a mass of 10 billion tonnes.
Palaeolithic humans in Spain began eating snails 10,000 years earlier than their Mediterranean neighbours, a study reveals.
A pair of rare ospreys nest at a nature reserve in Cumbria for the first time, conservationists confirm.
Marine mammals brought tuberculosis to the Americas before the Europeans arrived, a study suggests.
Rescuers comb through the site of Japan landslides
Researchers suggest some standard methods to reduce the spread of MRSA infections need to be re-evaluated as they may do more harm than good.
How Ebola crisis has affected West Africa's economies
The history of human evolution has been completely rewritten with the discovery that modern human beings and Neanderthals coexisted in Europe for much longer than previously thought.
Female orb-weaving spiders grow larger and have an increased ability to reproduce when living in urban areas, a new study shows.
An ecosystem thrives in the freezing Antarctic underbelly
A new study suggests that modern humans and Neanderthals co-existed in Europe 10 times longer than previously thought.
Part of the UK's problem with flooding is self-imposed, according to new research.
A new assessment from Europe's CryoSat spacecraft shows Greenland to be losing about 375 cu km of ice each year.
A doctor reports from the Ebola front line
Aerial pictures show flooding across the desert region of Phoenix, Arizona, following torrential storms.