The latest stories from the Science & Environment section of the BBC News web site.
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Medicine could soon be "cast back into the dark ages" unless action is taken to tackle the growing resistance to antibiotics, David Cameron says.
New tracking data shows that Chilean devil rays dive down nearly 2km below the ocean surface.
Higher levels of a compound known as non-structural carbohydrates boost tropical trees' chances of surviving droughts, a study suggests.
The British Trust for Ornithology wants members of the public to report their observations to help study the behaviour of some of our cleverest garden birds, rooks.
A bat is recorded for the first time on the remote Scottish archipelago of St Kilda, says the National Trust for Scotland.
Beavers living wild in Devon are to be caught and "rehomed" in captivity, the government says.
Malaria parasites may change the smell of infected mice, researchers say.
Scientists in the US have developed miniature balls which help stop catastrophic internal bleeding in injured mice.
Robots could soon be roaming over decommissioned nuclear sites and abandoned coal mines in the UK to test their ability to work autonomously.
Mars' 'Pillinger Point' honours British space scientist
Why was hay fever once seen as an upper-class disease?
What does Higgs particle tell us about lifetime of the Universe?
The British Trust for Ornithology is asking the public to help study the behaviour of rooks, one of our most intelligent garden birds.
Plans to build Europe's largest new nuclear project in Cumbria take a step forward after Toshiba and GDF Suez sign a deal to develop the site.
Climate change is likely to cut Antarctica's 600,000-strong emperor penguin population by at least a fifth by 2100, a study suggests.
How a gamekeeper's dog in southern Scotland is playing its part in helping to preserve the native red squirrel population.
Great spotted cuckoos lay their eggs while magpie mothers are still sitting on their nests, a study reveals.
Women should not worry about using sperm from older donors as the success rate is the same as for younger men, doctors say.
US space agency Nasa has successfully tested a flying-saucer shaped space craft that could help scientists plan future missions to Mars.
A new technique known as "supercooling" can preserve organs for days before they are transplanted, US researchers claim.