What is ‘storm Area 51’ and are alien-hunters about to raid the base?
‘We would discourage anyone from trying to come into the area’
Conjoined twins joined at skull separated after 50 hours of operations
Two-year-olds Safa and Marwa Ullah were born with their skulls and blood vessels fused together
Porn produces same amount of carbon dioxide as whole of Belgium
Digital sector needs to be heavily scrutinised in light of urgent need to reduce emissions
Southern right whales ‘whisper’ to offspring to avoid being heard
Pounding waves drown out quiet calls so killer whales can’t detect them
Top male athletes 'more attractive' than females, study claims
Athletic men would be better hunters and more able to provide for family, study suggests
Gorillas form 'lifetime bonds with distant relations' just like humans
Scientists discover gorillas have regular interaction with extended family and ‘friends’ just like us
Planting billions of trees is ‘most effective climate change solution’
As they grow and mature, trees could absorb and store 205 billion tonnes of carbon, study suggests
Tackle climate change by fertilising ocean with iron, expert says
Iron aerosols could cause ocean forests to develop ‘within weeks’, Sir David King says