from NDTV News - Top-stories https://ift.tt/2w6rxXq
World's Oldest Salt Mine In The Austrian Alps Holds Bronze Age Secrets
All mines need regular reinforcement against collapse, and Hallstatt, the world's oldest salt mine perched in the Austrian Alps, is no exception.
from NDTV News - Top-stories https://ift.tt/2w6rxXq
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from NDTV News - Top-stories https://ift.tt/2w6rxXq
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