Laetoli discovery shows ancestors walked slightly differently, with more flexed limbs.
Big cats and wolves are among the species that suffer most from depletion of foods.
Better hydrocarbon receptor made humans up to 1,000 times more desensitised to smoke toxins.
Calculations show chance of life evolving on other planets is far more likely in distant future.
The horse and cattle were on different farms, though only a couple kilometres apart.
The weapon was recovered next to the remains of an ancient Viking couple.
Studying Cepheid stars will help astronomers better understand the structure and evolution of our galaxy.
At least 17 rhinos killed in devastating Assam floods at Unesco heritage park.
All activity in Guangzhou has come to a standstill as the local administration issues its first-ever red alert.
More than 150 flights from Hong Kong cancelled, leaving thousands stranded.
Dead and dying coral covered with strange white growth absolutely 'sickening' says researcher.
As St Paul Island shrank access to freshwater became increasingly scarce, eventually wiping out the population.
Skeleton of royal in 20s or 30s was found buried with pots, jade beads and animal remains.
The bodies are thought to be the remains of Cylon supporters, following the failed coup in 632 BC.
Extremely hot, dry weather is hampering efforts of 5,300 firefighters and 16 helicopters.
The flash flood completely destroyed 4 to 5 buildings and heavily damaged up to 30 more.
Locals who saw the waterspout off the Suffolk coast mistook it for a tornado.
If Asteroid Bennu hits the Earth, the energy released would equal 200 Hiroshima bombs.
By altering their way of life, fire also created the conditions for new diseases to appear
Japanese fishermen knew about the whale which was unknown to science.
After decades shackled in the name of tradition, South Indian temples are now releasing these animals from captivity.
Monkeys, reptiles and other exotic animals are kept in the UK, with specific care needs.
Harnessing plasma for long duration space travel comes with big obstacles
Creators of Star Trek understood principals and limitations of time travel well
'There is still a long way to go in order to secure a stable future for this species' say campaigners
India's iconic tiger Jai remains missing after more than 100 days.
Red and eastern wolves are actually coyote hybrids according to study, but still deserve protections.
'I felt the electricty run up my legs to my chest and out my arms' says 16-year-old lifeguard.
Deep space radiation exposure believed to be responsible for increased risk of cardiovascular disease.
The earliest case of cancer was discovered in the foot bone of a mystery hominin species.