Giant Joint's ancestors found?

A 2,700-year old grave recently discovered in the Gobi Desert has come with an unexpected finding: nearly two pounds of marijuana. From MSNBC:

Nearly two pounds of still-green plant material found in a 2,700-year-old grave in the Gobi Desert has just been identified as the world's oldest marijuana stash, according to a paper in the latest issue of the Journal of Experimental Botany.

A barrage of tests proves the marijuana possessed potent psychoactive properties and casts doubt on the theory that the ancients only grew the plant for hemp in order to make clothing, rope and other objects.

They apparently were getting high too.

[...] What is in question, however, is how the marijuana was administered, since no pipes or other objects associated with smoking were found in the grave.

"Perhaps it was ingested orally," Russo said. "It might also have been fumigated, as the Scythian tribes to the north did subsequently."

MSNBC.com: "World's oldest marijuana stash totally busted"

Thanks to Elizabeth Spergel '12 for the tip.