It is one of the greatest fossil discoveries of our time, a trove of bones hidden deep inside a cave, outside Johannesburg in South Africa.
The team of scientists - from the Rising Star expedition - who made the discovery say the remains are that of 'Homo Naledi'. A new species of our human ancestor.
Homo Naledi is small-brained and primitive - yet revolutionary and complex in behaviour.
Its place in time is uncertain.
It may have lived as far back as three-million-years ago ... or could have roamed the earth as recently as 100,000 years ago.