Gigantic volcanoes like Yellowstone can erupt without an earthquake or any other external trigger, scientists have found.

RAF Tornado fighter jets have flown with parts made using 3D printing technology for the first time, defence company BAE Systems says.

China has for the first time destroyed a large quantity of confiscated ivory, in a public event described by conservation groups as a landmark move.

Scientists find some of the earliest evidence for widespread tooth decay in humans in Stone-Age hunter-gatherers, who lived in what is now Morocco more than 13,700 years ago.