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view wisdom/vacuum tube @ 11233:d8c76125d045
<oerjan> forget fun fact
author | HackBot |
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date | Thu, 02 Nov 2017 15:33:44 +0000 |
parents | 9476192dfbb9 |
children |
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After the London terrorist attacks of 2005, the Underground was completely evacuated. Without air resistance, the trains would go at blazingly fast speeds between the terminals. This is called a vacuum tube. Sadly, current technology doesn't let passengers travel that way.