Dogs can tell the difference between happy and angry human faces
First evidence of non-human animals sensing emotional expressions of another species.
Beginnings of star quartet captured by astronomers for first time
Multiple-star system early on in its formation 800-light years from Earth.
Pulverised skull of Martyr of Otranto was used as medicinal bone drink
Mystery of the holes drilled into 15th century martyr solved by scientists.
Big Bang not the start? Quantum theory suggests universe has existed forever
Physicists put forward theory that universe has no beginning and no end.
Before and after images show Arctic sea ice loss and Antarctic gains over 35 years
Nasa scientist say sea ice gains in Antarctic do not make up for loss in Arctic.
Chernobyl scientists warn radiation can be unleashed by climate change-induced wildfires
Wildfires could release radiation held in the upper layers of soil in Chernobyl forests.
Sunken city of Igarata begins to emerge as Brazil's drought sees water levels plummet
Town submerged in 1969 reappears as Brazil remains in one of the worst droughts in its history.
Angry Norwegian lemmings are the bravest of them all
Norwegian lemming behaviour a result of aposematism
Should autistic children be treated with marijuana?
No evidence supporting medical marijuana for children with behavioural problems.
Woman 'rapidly became obese' after poo transplant from overweight daughter
Case study shows how woman gained 40lbs after faecal transplant for bacterial infection.
Secrets of Namibia fairy circles unlocked with termite discovery
Mystery of African fairy circles edging closer to being solved by scientists.
Human evolution 'speeding up' as Darwin's survival of the fittest continues to shape us
Study of 10,000 people over 300 years shows how humans are still evolving.
Cannibal seals responsible for mystery 'corkscrew' pup deaths in Scotland [graphic image]
Researchers have evidence of cannibalism among grey seals after finding 86 dead pups.
Climate change millions of years ago confirm IPCC predictions
CO2 levels from Pliocene era three million years ago support climate change predictions.
Marijuana 'can reduce chronic stress and depression'
Endocannabinoids study suggests components of marijuana can reduce depression.
Lung cancer, women and smoking: How disease surpassed breast cancer as biggest killer (graphic image)
Lung cancer is now the leading cancer death in women in developed countries.
Minya: Ancient Egyptian mummies found floating in sewage canal
Greco-Roman era mummies discovered in tombs near Minya, Upper Egypt.
Prehistoric guinea pig was the size of a buffalo and had bite of a tiger
Josephoartigasia monesi used its ginormous incisors like an elephant uses its tusks.
Organism that hasn't evolved for 2 billion years 'proves Darwin right'
Sulphur bacteria discovered that has remained unchanged for half the Earth's history.
World Cancer Day 2015: Half of people in UK will get cancer at some point in their lives
Ageing population will see 50% of people in UK develop cancer in their lives.
MPs vote to allow 'three parent babies': The light at the end of a very dark tunnel
UK could become first country in the world to allow babies with DNA from three parents.
US government 'encouraging commercial development of the moon'
Federal Aviation Administration apparently says companies can now 'stake claim' to lunar territory.
Ancient Christian oracle book 'Gospel of the lots of Mary' deciphered
Coptic book dating back 1,500 years was a sort of early Magic 8 Ball for Egyptian Christians.
Climate sceptics 'stripped of last-ditch argument' with random variations in global warming
Scientists say there are no systematic errors in climate models of global warming.
Nasa's Europa Clipper mission edging closer in search for habitable potential on Jupiter moon
Nasa requests $30m for preliminary studies into mission to Jupiter's moon Europa.
Greece austerity measures linked with 'sharp and sustained' increase in suicides
Suicides in Greece reached a 30-year high in 2012 following further austerity measures.
Mercury levels in North Pacific to double by 2050, study of yellowfin tuna shows
Mercury levels in yellowfin tuna rising by at least 3.8% per year.
Mining the moon: US firm plans 'gas station in space' as China searches for rare earth elements
Richard Corfield looks at current plans to make money from the moon's resources.
City rabbits downsize burrows for perks of urban living
European rabbits found to be living in smaller burrows with fewer companions.
Shouting 'ow' helps people cope with pain by interfering with brain messages
Study shows scientific purpose of vocalising pain.
