Scientists determine the comet being followed by Europe's Rosetta spacecraft to have a mass of 10 billion tonnes.
Marine mammals brought tuberculosis to the Americas before the Europeans arrived, a study suggests.
Palaeolithic humans in Spain began eating snails 10,000 years earlier than their Mediterranean neighbours, a study reveals.
A new study suggests that modern humans and Neanderthals co-existed in Europe 10 times longer than previously thought.
Researchers suggest some standard methods to reduce the spread of MRSA infections need to be re-evaluated as they may do more harm than good.
A new assessment from Europe's CryoSat spacecraft shows Greenland to be losing about 375 cu km of ice each year.
Part of the UK's problem with flooding is self-imposed, according to new research.
For the first time, biologists measure the force applied by climbing snakes and find that they squeeze up to five times harder than necessary.
The risk of an eruption at Iceland's Bardarbunga volcano has increased, as well as the risk level to the aviation industry, meteorologists say.
Africa's elephants have reached a tipping point, where more are being killed each year by poachers than are being born, a study suggests.
A gorge in Taiwan, cut through rocks raised by a 1999 earthquake, is disappearing at an unprecedented rate, along with geological evidence.
Research into Richard III's bones and teeth reveals the last Plantagenet king drank about a bottle of wine a day in the last years of his reign.
Amazon river turtles communicate with their hatchlings and with one another using vocalisations, recordings reveal.
Science dispels the popular myth that magpies like to steal shiny objects for their nests.
Scientists discover the secret behind the super-white shells of some beetles.
Female orb-weaving spiders grow larger and have an increased ability to reproduce when living in urban areas, a new study shows.
Basing their work on the techniques used by octopuses and cuttlefish, US engineers have produced a flexible, colour-changing material.
A study suggests the way children draw at the age of four can be a predictor of intelligence 10 years later.
Scientists may have identified the first known dust particles from outside our Solar System, in samples returned to Earth by a Nasa space mission.
A probe that sniffs the aroma of dollars is being developed to help US-Mexico border police catch smugglers.
Scientists in Germany have pieced together a stunning mosaic image of the Martian surface.
The research arm of the US military is looking into designs for new, hi-tech tanks, focusing less on armour and more on mobility and speed.
A battery tattoo powered by perspiration has been unveiled by chemists in California.
The US marine park SeaWorld is to build a new killer whale enclosure as criticism grows over how the park handles the animals.
Researchers are developing mathematical models to help identify genetic material that could improve food crops' resilience to climate change.
A 10 foot long fish which used to dominate the Amazon river has been fished to extinction in a number of areas, a new study shows.
A type of genetically engineered fly which eventually kills itself off can be an effective method of pest control, according to new research.
Four of the world's emerging economies have claimed that they are far ahead of developed countries in their efforts to slow climate change.
Rural crime is rising, with a spate of sheep rustling and an increase in the theft of farming tools, vehicles and fuel driving up the figures.
A pair of rare ospreys nest at a nature reserve in Cumbria for the first time, conservationists confirm.