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.
The rate of deforestation in the Amazon is on the rise again. Over the past four years it has risen 35%.
Banda Detachment will 'explain how one of Earth's deepest sea areas became so deep'.
Researchers say the speed of light might have been much faster in the very early universe.
There are about 3,000 monkeys in the centre of Lopburi, and they regularly terrorise tourists and locals.
Skyscraper at centre of city has been sinking and tilting since it was completed in 2009.
Fast-melting glacier is breaking apart in a manner previously unseen in an Antarctic ice sheet.
A report from the Arctic Council identifies approaching social and ecological tipping points.
Understanding what causes visual impairment in astronauts is key to mount a mission to Mars.