The beautifully preserved remains of a 47-million-year-old lemur-like creature have been unveiled in the US.
The preservation is so good, it is possible to see the outline of its fur and even traces of its last meal.
The fossil, nicknamed Ida, is claimed to be a "missing link" between today's higher primates - monkeys, apes and humans - and more distant relatives.
But some independent experts, awaiting an opportunity to see the new fossil, are sceptical of the claim.
Here, in a David Attenborough-narrated BBC programme, Uncovering Our Earliest Ancestor: The Link, the fossil is revealed in virtual reality.
Uncovering Our Earliest Ancestor: The Link is on Tuesday 26 May on BBC One at 2100 GMT