Germany was decades ahead in the concept of space and living conditions. AS indicated in this article, suggests the extend of Germany experiments in underground facilities .
PROGRESS AND DISCOVERY
Boring a Tunnel 9,000 Feet Up Completing a cogwheel railway up the
Zugspitz, highest peak in the German Alps, workmen are driving a tunnel
into the mountain at a height of 9,000 feet. Each day they travel to
their job by cableway. Above: The lofty tunnel entrance, looking from
within. At right:...
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