Engineers are working for free to make Elon Musk's Hyperloop a reality
 

Nobody laughs much at Elon Musk anymore, but plenty of people snickered at his Hyperloop idea (okay, also the killer robot thing). To remind you, the Hyperloop is a series of underground trains powered by compressed air that transport folks between c...

http://www.engadget.com/2014/12/19/e...=rss_truncated