A 'new frontier' in archaeology may allow researchers to know the drug use habits of ancient humans.<br />Science Magazine reports a new technique analyzes drug residue in the tartar of teeth--the hardened plaque that your dentist scrapes off each year.<br />Tartar traps bits of food, drink, and other substances while a person is living, and it can survive more than 1 million years on fossils.<br />In fact, Science Magazine reports the crusty stuff has been investigated for decades, mostly to understand the diets of past peoples.<br />But the new method led to the identification of drug traces on 19th-century skeletons and in 10 recently deceased individuals.<br />This could allow researchers to trace humanity’s drug habits back hundreds of thousands of years.
