The south east coast of Tamil Nadu was inhabited in pre-historic times mainly by Caucasoids, Mongoloids, Negroids and Australoids rather than people similar to contemporary Tamils, a dental anthropological study has found. A team of anthropologists came to the finding after studying more than 1,000 teeth from Adichanallur's pre-historic harbour site on the south-east coast of Tamil Nadu that dates back to 2,500 BC... Optical microscope techniques were employed to study the teeth, which have shown the various growth stages, ageing and wearing processes, racial and ethnic and geographical affinities, dietary patterns, jaw mechanism, constitutional abnormalities of the jaws, pathological...