The latest stories from the Science & Environment section of the BBC News web site.
Updated: 53 min 31 sec ago
Europe's Rosetta spacecraft is edging ever closer to its quarry - the 4km-wide Comet 67P/Churyumov-Gerasimenko.
Scientists on rival projects looking for evidence that the early Universe underwent a super-expansion are in discussion about working together and publishing a joint paper.
A major study into the potential of fracking to contaminate drinking water with methane is published, highlighting where shale deposits and aquifers coincide.
Plants have been grown inside a microscope to allow scientists to watch their roots developing in 3D.
Members of the public are being asked to send in their sightings of the UK's bizarre and beautiful woodland moths for Moth Night 2014.
Scientists have worked out the unique anatomy that allows giraffes' long, spindly legs to support their weight.
Fossil reveals early bird's feathered "trousers"
Tackle food waste and help feed the world
Oklahoma drought kindles spectre of 1930s crisis
Parts of the United States are experiencing the worst drought for decades with farmers warning that harvests are being badly hit.
A gene that allows present-day people cope with life at high altitude was inherited from an extinct species of human, Nature journal has reported.
The UK will have to divert a significant amount of waste away from landfill under new EU proposals on recycling.
New research shows that the spread of TB in cattle can only be controlled if more radical measures are adopted.
Research reporting one of the biggest "breakthroughs" in stem-cell science has been withdrawn after "critical errors" were discovered.
Nasa has launched a mission dedicated to measuring carbon dioxide (CO2) from space.
The US space agency lofts a high-resolution carbon dioxide observatory, to study where the gas is being emitted and absorbed at the Earth's surface.
African cichlid fish's memory of feeding areas can span up to twelve days, scientists show.
Many coral reefs in the Caribbean could vanish in the next 20 years, according to a report published by the International Union for the Conservation of Nature.
Naps may help dormice save energy and survive until it is time to hibernate, say scientists.
Medicine could soon be "cast back into the dark ages" unless action is taken to tackle the growing resistance to antibiotics, David Cameron says.