Tea is often referred to one of the world's oldest beverages. But just how old is it?
A Chinese document from 59 B.C. refers to a drink that might be tea, but scholars cannot be certain. Now, a new analysis proves that plant remains found in tombs 2,100 years old – about 100 years before that document – definitely are tea, the oldest physical evidence for the drink. And the buried tea was high-quality stuff, fit for an emperor.