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Toxic troubles for climate 'fix'Spreading iron in the oceans as a climate "fix" could poison marine mammals and birds, scientists show.
+ Home improvement 'hitting swifts'A survey of swifts suggests the species is at risk from improvement work being undertaken on old houses.
+ Tiger decline 'sign of failure'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.
+ Mars moon Phobos seen in detailThe European Mars Express probe releases new pictures from its close flybys of the Martian moon Phobos.
+ Reindeer body clock switched offReindeer have "switched off" their internal body clocks to survive dark winters and light summers in the Arctic.
+ UK responds to EU noise directiveThe government has responded to the EU Noise Directive by publishing a long-delayed noise policy statement.
+ Bee swarms follow 'pied pipers'A tiny group of bees act like "pied pipers" to trigger the onset of "explosive" swarms leaving the hive, report scientists.
+ Apollo men decry Obama Moon plansNasa Moon astronauts tell the BBC President Barack Obama's decision to cancel the US lunar programme is "catastrophic".
+ Climate linked to smaller birdsSongbirds on the US east coast are becoming smaller, a trend thought to be driven by climate changes.
+ What happened next? Zebra puts head in hippo's mouthA zebra at Zurich Zoo appeared doomed when visitors saw its head in the mouth of a hippo, but it was only cleaning its teeth.
+ Late-blooming daffodils spark web appealTourism bosses in Cumbria urge people to get in touch if they see a blooming daffodil, after the cold weather delays growth.
+ Earth WatchUgly rumours put rhinos and tigers on extinction road
+ Beauty and powerWhat Saturn's rings tell us about the entire Solar System
+ Powering upJapan's home fuel-cell tech to take on Europe
