In 1969, whilst teaching at the University of Sydney, Alan Thorne reconstructed the remains of
LM1 (also known as "Mungo Lady") and
LM3 (also known as "Mungo Man") in 1974. He is also accredited for reconstructing fossil
WLH-50 in 1982. Though
Jim Bowler has been credited with the discovery of both LM1 and LM3, Thorne performed the reconstruction and analysis of the individual fossil sets. Through the initial reconstruction of "Mungo Lady", Thorne found the bones to be thin and frail, very similar to the bones found in human beings today. The skull thickness of the "Mungo Lady" set, in particular, proved to be the most significant contradiction, as other uncovered Australian
hominid specimens dated to approximately the same time period (about 25,000 years ago) have been tall and thick-skulled. Upon realising this contradiction, Thorne began to examine the possibility of new theories to address the fundamental question of "where did Homo sapiens come from?". Thorne's discovery and reconstruction of "Mungo Lady" led him to question the validity of the "
Out of Africa" theory commonly held by many anthropologists. His specimen contained an advanced skull and overall anatomy that resembled modern day humans, but originated during an era and in a location where such hominids were believed not to exist. As a result of what had been uncovered at Lake Mungo, Thorne devoted a large amount of time and energy into constructing a theory that would prove that there had been only one human migration out of Africa and sought support from colleagues in various parts of the world. The single migration, which could have taken place around two million years ago, would have involved
Homo sapiens, rather than the
Homo erectus species posited by his opponents. When speaking publicly on the matter, Thorne conveyed confidence in his new discovery, stating that "only one species of human has ever left Africa, and that is us." == Kow Swamp ==