The remarkable remains of two ancient human-like creatures (hominids) have been found in South Africa.
The fossils of a female adult and a juvenile male - perhaps mother and son - are just under two million years old.
The team behind the discovery reports in the journal Science that the new species should be assigned the name Australopithecus sediba.
Here, the interior of the skull of the juvenile specimen is probed by brilliant X-rays.
The study has revealed information about the ancient animal's brain and tantalising evidence of the insects that may have fed on the dead body.
Reconstruction courtesy of Paul Tafforeau/Lee Berger/ESRF/University of the Witwatersrand