Britain's Stone Age population was almost completely replaced some 4,500 years ago, a study shows.
Campaigners win a third High Court victory over the UK government's plans to tackle air pollution.
Scientists scan Tasmanian tiger specimens to better understand the marsupial's development in the pouch.
How should the UK dispose of its plastic waste?
Why the Jaws shark is not a 'man-eating monster'
Underwater Photographer of the Year competition
Elon Musk: The entrepreneur behind Tesla and the Falcon Heavy
How to stop a supersonic car from sliding sideways
The Indian state leading in clean energy
Take the Brain of Britain quiz
Sign up for our newsletter