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Spreading iron in the oceans as a climate "fix" could poison marine mammals and birds, scientists show.
A survey of swifts suggests the species is at risk from improvement work being undertaken on old houses.
Governments need to crack down on the illegal trade in tiger parts if the big cats are to be saved from extinction, the UN warns.
The European Mars Express probe releases new pictures from its close flybys of the Martian moon Phobos.
Reindeer have "switched off" their internal body clocks to survive dark winters and light summers in the Arctic.
The government has responded to the EU Noise Directive by publishing a long-delayed noise policy statement.
A tiny group of bees act like "pied pipers" to trigger the onset of "explosive" swarms leaving the hive, report scientists.
Nasa Moon astronauts tell the BBC President Barack Obama's decision to cancel the US lunar programme is "catastrophic".
A zebra at Zurich Zoo appeared doomed when visitors saw its head in the mouth of a hippo, but it was only cleaning its teeth.
Tourism bosses in Cumbria urge people to get in touch if they see a blooming daffodil, after the cold weather delays growth.
16 Mar
More reason than ever to deal with the climate debacle
20 Jan
Ugly rumours put rhinos and tigers on extinction road
12 Mar
What Saturn's rings tell us about the entire Solar System
12 Mar
Japan's home fuel-cell tech to take on Europe
11 Mar
Learning from bears' love of telegraph poles
12 Mar
The waste fuel for your motor that won't cost a lot
Europe is set to release its first non-native "biological control" species to curb the spread of Japanese knotweed.
Commercial and political interests are abusing historical whaling rights of indigenous people.
The largest meat-eating plant in the world eats animal poo study finds.
EU nations decide to support a Atlantic bluefin tuna ban.
Scientists say they have been able to tell which past event a person is recalling using a brain scan.
Fifty-one decapitated skeletons found in a burial pit in Dorset were those of Scandinavian Vikings, scientists say.
Researchers in Edinburgh say they have solved the mystery of why some chickens hatch out half-male and half-female.
Deforestation has revealed what could be a giant impact crater in Central Africa, according to Italian scientists.