Yes, and the researchers/scientists are quoted saying as much in the article
75The Scythians then take the seed of this hemp and creep under the felt coverings, and then they throw the seed upon the stones which have been heated red-hot: and it burns like incense and produces a vapour so thick that no vapour-bath in Hellas would surpass it: and the Scythians being delighted with the vapour-bath howl like wolves.[72] This is to them instead of washing, for in fact they do not wash their bodies at all in water.”
Herodotus.
— Now Herodotus is not exactly a reliable historian, but I don’t think there is any reason for him to have just invented this.
"Chemical analysis of braids of hair from the bodies of several people found in the central burial chamber identified chemical signatures consistent with THC"
It's not unreasonable to think it possible.