An ancient skull, uncovered decades ago in China, has recently been revealed to be possibly the closest ever relative to humankind. It's called "Dragon Man", and based on trace uranium inside the skull, it's been dated to at least 146,000 years old - but could well be much older! This puts it at a critical time period in human evolution, when our ancestors were first emerging within Africa. But there's some disagreement about whether the fossil is from an entirely new species, or is linked to other sets of fossils found in East Asia. Palaeoanthropologist John Hawks, who wasn't involved in the... Like this podcast? Please help us by supporting the Naked Scientists