175 Years Ago The First Modern Tunnel Was Built, Inspired by a Burrowing Animal

175 years ago the first modern tunnel was opened to the public. Its construction was inspired by a burrowing animal.

from Forbes Real Time https://www.forbes.com/sites/davidbressan/2018/03/25/175-years-ago-the-first-modern-tunnel-was-built-inspired-by-a-burrowing-animal/
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