The latest stories from the Science & Environment section of the BBC News web site.
Updated: 3 hours 8 min ago
More than a ton of confiscated ivory is crushed in New York's Times Square to send a message that the illegal trade will not be tolerated.
Scientists say they have the best evidence yet that there is hot lava spewing from the surface of Venus.
Europe's Philae comet lander has been back in touch with Earth - its first contact since Sunday.
Hundreds of thousands of tiny crabs have been washing up on Southern California's beaches, after warm ocean currents carried them closer to the shoreline than usual.
The women scientists who failed to get credit
The Pope issued his letter on the environment on Thursday. In it he said that climate change was mostly a man-made problem.
Scientists report that wild kangaroos tend to favour their left hands in common tasks - the first example of non-human, species-wide "handedness".
Most illegally poached African elephant ivory can be traced back to just two areas of Africa, research shows.
DNA tests show an ancient skeleton known as Kennewick Man is related to modern Native Americans - reigniting a debate over whether his bones should be returned to local tribes and reburied.
A pygmy hippopotamus calf has taken to the water for the first time with his mother at Melbourne Zoo.
Policymakers have a "once in a generation" opportunity to reform the insurance sector to help those at risk from climate change impacts, say researchers.
Pope Francis has blamed human selfishness for global warming in his long-awaited encyclical calling for action on climate change.
New onshore wind farms will be excluded from a UK government subsidy scheme from 1 April 2016 - a year earlier than expected.
Neuroscientists find that artificially stimulating a positive memory can cause mice to snap out of depression-like behaviour.
Scientists use genetic markers to build a criminal's face
One of the UK's most threatened birds - the bittern - is returning to England and Wales, according to conservationists.
A tiger that killed a man and wounded another after escaping from a flooded zoo in Georgia has been shot dead, the Georgian interior ministry says.
A global bioenergy assessment concludes that biofuels could provide up to a third of the world's transport fuel needs by the middle of the century.
France's Ecology Minister Segolene Royal urges people to stop eating Nutella because it is made with palm oil and damages the environment.
No new signals have been picked up from the Philae comet lander since a brief radio contact on Sunday, but controllers say this is not surprising.