Five Pacific islands have disappeared as a result of rising sea levels in a first confirmation of the impact of climate change on coastlines, scientists say.

Archaeologists say a tiny stone flake from north-western Australia, nearly 50,000 years old, is a remnant of the earliest known axe with a handle.

Europe's Swarm space mission is providing an unprecedented view of Earth's protective magnetic field, scientists say.

Fish are unable to learn the scent of their predators in dying coral reefs, research reveals.