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Elon Musk's Big Idea: The Hyperloop, an 800mph Pneumatic Tube

3
Blind Frog Belly White8/12/2013 5:53:25 pm PDT

If you build it underground, you have to dig 800 miles of tunnels and seal them, and hope they don’t get cracked from seismic activity.

If you build it aboveground, you risk sabotage, and at 800 mph, you’re talking a bunch of goo on the forward bulkhead.