Indian national Kailash Satyarthi and Pakistan's Malala Yousafzai have won the 2014 Nobel Peace prize for advocating children's rights.
Scientists are struggling to explain a slowdown in climate change that defies a rise in global greenhouse gas emissions.
A big expansion of Antarctica's ice almost a million years ago may help scientists predict modern climate change, a study has shown.
A huge explosion has wrecked government buildings in Oslo, including the office of Norway's prime minister. Several people were injured in the blast.
Investments to create jobs in clean energies risk backfiring by curbing employment in other parts of the economy, a study has shown.
Birds falling out of the sky in the US and Sweden are freak examples of the kind of mass animal deaths that have unusual but not apocalyptic causes.
Almost 200 nations sought to break a deadlock between rich and poor on steps to fight global warming.
Illegal logging has fallen by 22% worldwide in the past decade but remains a huge problem from Brazil to Indonesia, a study showed on Thursday.
The UN has defended its panel of climate scientists from criticisms that an error about the thaw of Himalayan glaciers undermined its wider findings.
Fifty-five countries have formally pledged to cut or limit their emissions in a move welcomed by the UN's climate-change body.