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By Matt McGrathEnvironment correspondent, BBC News The burning of wood is a major source of black carbon the world over. Black carbon, or soot, is making a much larger contribution to global warming than previously recognised, according to research. Scientists say that particles from diesel engines and wood burning could be having twice as much warming effect...

By Matt McGrathEnvironment correspondent, BBC News Despite a record hot year in the US, the rest of the world did not follow US scientists say that 2012 was among the 10 warmest years the world has experienced since 1880. Nasa researchers said it was the ninth warmest year while experts from another American agency said it was the tenth. Both teams said that temperatures...

By Jonathan AmosScience correspondent The area chosen for drilling has been named "John Klein", a rover engineer who died in 2011 The US space agency (Nasa) says it is now ready for its Curiosity rover to start drilling on Mars. A target patch of ground has been chosen in an area that contains a diverse range of rocks, many of which were clearly deposited...

By Matt McGrathEnvironment correspondent, BBC News The burning of wood is a major source of black carbon the world over. New research says that black carbon, or soot, is making a much larger contribution to global warming than previously recognised. Scientists say that particles from diesel engines and wood burning could be having twice as much warming effect...

By David ShukmanScience editor, BBC News Graphene could find uses in computing, energy, medicine and other fields A surge in research into the novel material graphene reveals an intensifying global contest to lead a potential industrial revolution. Latest figures show a sharp rise in patents filed to claim copyright over different aspects of graphene since 2007,...

By Rebecca MorelleScience reporter, BBC World Service Researchers compared the DNA of Aboriginal Australians with Indians' genetic material Australia experienced a wave of migration from India about 4,000 years ago, a genetic study suggests. It was thought the continent had been largely isolated after the first humans arrived about 40,000 years ago until the...

By Matt McGrathEnvironment correspondent, BBC News One of the world's biggest tidal energy turbines being prepared for deployment in Scotland New research indicates that the UK is underestimating the amount of electricity that could be generated from tidal sources. The analysis says that estuary barrages and tidal streams could provide more than 20% of the...

By Roger HarrabinEnvironment analyst Efforts to curb emissions at a national level are making a difference, the report says Politicians are doing more to combat climate change than they are given credit for, according to a report. It says 32 out of 33 countries surveyed have introduced, or are producing, significant climate-related laws. Out of these, 18 nations...

By Jason PalmerLong Beach, California, USA The ultraviolet range that Galex can see in revealed a wealth of new stars at the galaxy's outer reaches Astronomers have spotted the largest known spiral galaxy – by accident. A team was looking through data from the Galaxy Evolution Explorer (Galex) satellite for star-forming regions around a galaxy called...

By Matt McGrathEnvironment correspondent, BBC News A dead rhino is dehorned by a researcher in Zimbabwe Figures from the South African government indicate that poaching for rhinoceros has increased substantially in the last year. A record 668 rhinos were killed for their horns in 2012, up almost 50% on the number for 2011. The majority of the animals were killed...