Scientists record the intimate changes involved when a caterpillar transforms into a butterfly using micro-CT (computerised tomography) scans.

A team from the UK's Chester Zoo is heading to a mountainous national park in Nigeria to carry out the first biodiversity assessment in the area.

Japan says it had successfully extracted natural gas from frozen methane hydrate off its central coast, in what it says is a world first.

Far-reaching restrictions on the trade in hardwood trees have been agreed at Cites, the major conservation meeting being held in Thailand.

A Brazilian doctor faces charges of fraud after being caught on camera using silicon fingers to sign in for her absent colleagues, police say.

The US space agency reports that its Curiosity rover has identified clay minerals on Mars - an important indicator of water in the planet's past.