alt Hacker News> You don't hear that much about great engineering projects today
Here's a great engineering project: https://en.wikipedia.org/wiki/Hawthorne_test_tunnel
> You don't hear that much about great engineering projects today
Here's a great engineering project: https://en.wikipedia.org/wiki/Hawthorne_test_tunnel
Serious question about hyperloop trains running in a vacuum. How do you cool the carriages?