The latest stories from the Science & Environment section of the BBC News web site.
Updated: 19 min 3 sec ago
Arctic sea-ice volume during the first two weeks of October was about 6,200 cubic km, according to the Cryosat spacecraft - tracking down from the high in 2013.
Can you make a moral case for eating meat?
BBC News NI's Conor Macauley joins a group of volunteers from Copeland Bird Observatory to record seals on the County Down coastline.
Archive footage has been uncovered of a group of beavers being parachuted into wilderness in the US.
Climate negotiations in Bonn proceed slowly, with the ghost of Copenhagen in attendance.
Warmer temperatures are threatening to shrink the habitat of the snow leopard, the big cat already struggling against extinction, a report says.
An image of Kerberos, one of the two tiny moons of Pluto, arrives from Nasa's New Horizons probe.
The BBC's Roger Harrabin explains how the climate change talks in Bonn work and who is there.
An "extremely rare" half male, half female butterfly is found in Hertfordshire.
Monkeys face an "evolutionary trade off" between a deep, impressive voice and producing lots of sperm, researchers discover.
Alzheimer's disease can be detected decades before onset, using a virtual reality test, a study suggests.
Plague has been a scourge on humanity for far longer than previously thought, samples of ancient DNA show.
The Indian women who answer cat calls
Negotiators meeting at UN climate talks in Germany say that questions over cash are the biggest barrier to a new global deal.
Sir Tim Smit signs a contract to build an Eden project on the east coast of China.
Monday will see an international team of scientists set sail for the mid-Atlantic on a quest to sample microorganisms living deep in the ocean floor.
EU aid aimed at curbing the illegal timber trade was poorly managed, say auditors, who are urging better targeting and monitoring.
The Home Office's annual statistics show a 6% drop in animal experiments in the UK - but the office has changed the way it collects these figures.
What do we - and don't we - know?
US scientists perform a macabre set of experiments to bolster their controversial argument that fist fights shaped the human hand.