The latest stories from the Science & Environment section of the BBC News web site.
Updated: 2 min 40 sec ago
Physicists send a beam of twisted light 3km through the air above Vienna, transmitting information in this way for the very first time in the open air.
Parts of Canada and the US get their first blast of winter, sending temperatures plummeting by as much as 22C (40F) in days.
China and the US unveil "historic" new pledges on greenhouse gas emissions, as the two leaders meet for talks in Beijing.
Ministers have "completely oversold" the potential of shale gas, researchers from the UK Energy Research Centre tell the BBC.
Meet the medical motorbike couriers battling infant HIV in Malawi
A study shows that human brainwaves can wirelessly activate light-sensitive genes implanted in mice.
Six priority areas for Scottish wildcat conservation are identified following research commissioned by Scottish Natural Heritage.
Google is to pay over £1bn to rent an airfield but little is known about what it plans to do there.
David Shukman explains how craft landed on a comet
World governments are breaking promises to phase out subsidies for fossil fuels, a report by the Overseas Development Institute says.
Springwatch host Chris Packham writes an open letter to Ant and Dec imploring them to end "abuse of animals" in I'm A Celebrity... Get Me Out of Here!
With the Rosetta spacecraft in orbit around comet 67P/Churyumov-Gerasimenko, scientists are hoping for a windfall of new information about these strangest of objects.
European Space Agency officials say all is well ahead of this week's historic bid to try to land a probe on the surface of Comet 67P/Churyumov-Gerasimenko.
A group of Italian scientists convicted of manslaughter for failing to predict a deadly earthquake in 2009 have had the verdict quashed.
A book introducing the importance of materials wins the 2014 Royal Society Winton Prize.
Bill Gates says "surveillance systems" are needed to spot the signs of a disease outbreak earlier and prevent crises like the Ebola situation in West Africa.
Pylon cables will disappear from some parts of England and Wales as National Grid looks to reduce the impact of energy transmission on the landscape.
Robots roaming the remote Southern Ocean, controlled from Norfolk by satellite, are collecting information on how warm water is melting the Antarctic ice cap.
An agricultural pest that can cause widespread damage to crops could establish itself within the UK, according to a scientist.
Some of the world's top scientists have won huge cash prizes at an awards show in Silicon Valley, in California.