Ronald J. Clarke

He also discovered the ''Homo ergaster'' partial cranium SK 847. He also played a role in the discovery of a new skeleton of ''Homo habilis'' related to ''Homo rudolfensis''.
He was associated with the University of the Witwatersrand, then joined Johann Wolfgang Goethe University of Frankfurt am Main in Frankfurt, Germany where he continued his work excavating "Little Foot". He later rejoined the University of the Witwatersrand's Institute for Human Evolution, where he remains as of present. Provided by Wikipedia