Old image of women insulating her house with a dung on 1967 | Ramechhap, Nepal

Cow and Buffalo dung is being used as fossil to burn fire since years. People put dung on the walls of the houses to make it dry and later they used those as fossils. 

And following image shows woman insulating her house with dung in Nangbo, Ramechhap during 1967

Photo by Joe & Sue Hammerman