Vietnamese archaeologists announce their findings of their excavation and and conservation project at the Xom Trai Cave in Hoa Binh province. Among the finds include the 8,000-year-old road reported earlier, as well as numerous stone tools and human burials. There’s an interesting mention about a find of mineral rock that was used as nutritional supplements – does anyone have more information about this? How do they know that ancient peoples ingested rocks for nutritional supplements?
Hoa Binh archaeological site preservation project announced
Nhan Dan, 12 March 2009
Many ancient artifacts excavated in Hoa Binhâ€™s Xom Trai cave
Voice of Vietnam News, 13 March 2009