That’s interesting, thank you. I wonder if it was simply time management to have... | Hacker News

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		pixxel on June 5, 2020 \| parent \| context \| favorite \| on: First photo of HS2 tunnel boring machines That’s interesting, thank you. I wonder if it was simply time management to have both sides meet at the middle or politics/symbolism. The former?

nicoburns on June 5, 2020 [–]

Well, it's by far the quickest way to dig the tunnel.

mkl on June 5, 2020 | [–]

And it's been done for at least 2500 years: https://en.wikipedia.org/wiki/Tunnel_of_Eupalinos and more at https://fermatslibrary.com/s/the-tunnel-of-samos

That tunnel is over a kilometre long, and they met in the middle of a hill!

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