The latest stories from the Science & Environment section of the BBC News web site.
Updated: 14 min 42 sec ago
US physicist Eli Yablonovitch, who first created "photonic crystals" to repel, trap and steer light, will receive the Newton Medal from the UK's Institute of Physics.
Midnight came later on Tuesday as for the first time in three years an extra second was added to the official time set by atomic clocks.
'Circademics' get serious about the circus
A solar-powered plane that is attempting to cross the Pacific Ocean is encountering its first weather front.
A solar powered plane is encountering its first weather front during its attempt to cross the Pacific Ocean.
A bird can communicate by rearranging sounds into calls that convey meaning in the same way that humans use language, say scientists.
Midnight will come later tonight, as for the first time in three years, an extra second is added to the official time set by atomic clocks.
China - the world's largest emitter of greenhouse gases - has announced details of its climate action plan.
The UK must take urgent action to prepare for the impacts of climate change in the UK, according to a report submitted to the government.
China is set to reveal how much it will cut carbon emissions by beyond 2020, says Premier Li Keqiang during a visit to Europe.
Italian astronaut Samantha Cristoforetti on life in space
The US Supreme Court blocks a key government attempt to limit pollution from the country's power plants after industry challenges the changes.
An application to start fracking at a site in Lancashire is rejected by county councillors.
A solar-powered plane has passed the "point of no return" in its second bid at making a record-breaking flight across the Pacific Ocean.
A solar-powered plane passes the "point of no return" after leaving Japan for a second attempt at a record-breaking flight across the Pacific Ocean.
Charting China's climate change ambitions
An unmanned SpaceX Falcon-9 rocket breaks apart in flames after lift-off from Cape Canaveral, Florida - its first failure in 19 launches.
One of the world's largest and smelliest flowers has blossomed for the first time in Scotland.
Does the future of wildlife lie in captivity?
On a family hunt for the now rarely-seen stag beetle