The potentially-groundbreaking new transportation system called Evacuated Tube Transport would travel at speeds of up to 4,000 mph. Read more: http://www.metro.co.uk/tech/896790-evacuated-tube-transport-to-enable-round-the-world-travel-in-just-6-hours Space X and Tesla Motors CEO Elon Musk has unveiled his own proposal for a rapid tube-like transportation system called hyperloop. Add TDC to your circles on Google+ https://plus.google.com/100134925804523235350/posts Join the conversation on Facebook http://www.facebook.com/thedailyconversation Follow The Daily Conversation on Twitter http://www.twitter.com/thedailyconvo