Telling tooth - news story - 13 Jul 2012
Fossils of human ancestors are all too rare, so this was a great find. A small tooth sticking out of a boulder led to it being scanned - revealing what might be the remains of the most complete Australopithecus sediba found so far.
The metre-long rock had been in a South African University lab since 2008, and was dotted with small fossils. It was only once a lab technician spotted a little tooth that the whole lump was studied more closely and the scan showed its important contents.
It will be some time before the bones are extracted - it's painstaking work - but the results will be a hugely valuable addition to an area we still have a lot of gaps to fill. You can read more about it here.