Lake Mungo 3 burial discovered 1974 east of Mungo 1 site. Initial age 28,000-32,000 years based on stratigraphy. ESR bone date 31,000 ±7,000 years unreliable per experts. Thorne dates 57,000-71,000 years using ESR enamel, U-series, OSL. Burial younger than 43,000-year Mungo Unit base. New OSL dates maximum 50,000 years for LM3. Possible age 15,000-50,000 years during habitable lake phase. Adcock extracts mtDNA from LM3 fragments. LM3 mtDNA differs from living Aborigines and Kow Swamp Pleistocene skeletons. LM3 lineage diverges before MRCA of contemporary human mtDNAs. LM3 lineage extinct in mtDNA but survives as nuclear insert on chromosome 11. Deepest mtDNA lineage known from anatomically modern human in Australia. Hot Willandra climate precludes ancient DNA preservation beyond 10,000 years. Contamination likely without replication or authentication criteria. Postmortem damage mimics unusual sequences in LM3 DNA. LM3 morphology gracile with feminine supraorbitals and thin frontal. Stature 170 cm exceeds modern southeastern Aboriginal women. Sex uncertain lacking pelvis and full cranium. Older adult shown by tooth wear, pulp exposure, osteoarthritis. No distinct gracile-robust division in Pleistocene Australians. Thorne links robusts to Javan Homo erectus migrants. Graciles from East Asian migrants per Thorne. Brown's analyses reject two biologically distinct Pleistocene groups. Living Aborigines unrelated maternally to LM3 lineage.