Chinese researchers have unveiled an ancient skull that could belong to a completely new species of human.
The team has claimed it is our closest evolutionary relative among known species of ancient human, such as Neanderthals and Homo erectus.
Nicknamed "Dragon Man", the specimen represents a human group that lived in East Asia at least 146,000 years ago.
It was found at Harbin, north-east China, in 1933, but only came to the attention of scientists more recently.