Dinosaurs had 'earliest feathers'

Exceptionally well preserved dinosaur fossils uncovered in north-eastern China display the earliest known feathers.

The creatures are all more than 150 million years old.

The new finds are indisputably older than Archaeopteryx, the "oldest bird" recognised by science.

Professor Xu Xing and colleagues tell the journal Nature that this represents the final proof that dinosaurs were ancestral to birds.

The theory that birds evolved from dinosaurs has always been troubled by the absence of feathers more ancient than those on the famous Archaeopteryx.