Activists worry the decision could be reversed once President-elect Donald Trump takes over from Barack Obama on 20 January 2017.
Nuclear plants need to be protected against natural disasters occurring once every 10,000 years.
A bison tail preserved in permafrost could give scientists access to ancient bison DNA to use in their cloning work.
Shifts in atmospheric circulation quickly created the Sahara Desert less than 6,000 years ago.
The drug would be sold in US states where recreational cannabis is now legal.
Biological control has failed in the past, but conservationists believe the 2mm wasp will work.
Climate change will halve Vietnam's coffee plantations by 2050, but destroying forests for more plantations would make the problem worse.
On 15 December, a new site called Lascaux 4 will open its door to educate the public about the 20,000 years old paintings.
The black organic samples had incorrectly been identified as tar in the past.
Those with asthma, heart or lung problems, or with babies in London warned to take care when outdoors.
The overall number of tornadoes hasn't increased, but they're coming in bigger, more dangerous clusters.
Ancient burials in central Brazil suggest corpses were mutilated, defleshed and burnt after death
Astronaut was visiting Antarctica as part of a tourist group.
Progress is coming and it will bring abundant, clean, safe energy with it.
Tooth removal, mutilations and cannibalism were potentially involved in ancient burial practices
Asteroid 2015 TC25 will help scientists understand the bigger ones that meteorites come from.
The decade saw freakishly bad weather – and if the cold didn't kill you, famine, disease or poverty might.
Inaccuracy of polling prompts psychologists to take another look at why we vote the way we do.
The remains had been found in the queen's spectacular tomb, but it wasn't clear if they did belong to her.
Protesters have spent months rallying against the pipeline project, saying it poses a threat to water resources and sacred Native American sites.
You can now see a galaxy from the comfort of your home thanks to an algorithm-enhanced telescope.
Eruption in 946CE released more climate forcing gasses than any other volcano in last 2,000 years.
Elite Turkish feasts drove demand for elaborate pottery 3,000 years ago.
Lucy probably had a funny walk due to an inefficient gait.
How much brain content would remain intact, and would the person be the same as they were before?
The expedition aims to tackle gender inequality in science and boost female leadership in fighting climate change.
The iconic sea creature feeds on plankton well beneath the surface, isotope analysis shows.
Light emitted from neutron star appears to be subject to quantum effect 'vacuum birefringence'.
The University of Sheffield has discovered a huge burial site at a 14th century monastery in Lincolnshire.
Glass beads and vessels found in Mesopotamia were made later than previously thought, based on Egyptian creations.