One of Elon Musk’s more recent ideas is the Hyperloop. If you haven’t heard of it, its supposed to be a pneumatic tube that transports pods across California (then across the country if it works). In theory, using the Hyperloop, passengers could travel from Northern California to Southern California in a little over 30 minutes by traveling at 760 mph, slowing down only at exit and entry like a ski-lift. Not only is it faster (significantly) than modern day trains, but, according to Musk, it could be made for a fraction of the cost of building high-speed railways between cities. If you think its crazy, so does Craig Hodgetts, the man heading the research team behind Hyperloop. “Its pure science fiction”, Hodgetts has said, referring to the idea of transporting passengers that quickly and efficiently in a tube. However, Hodgetts does relent that the physics behind the idea are conceptually sound. The main hurdles facing Hyperloop right now are environmental and regulatory concerns and how to integrate the tubes into cities. Musk has said that he would like to make the Hyperloop stations easy to navigate and get to, unlike most airports whose inconvenience may deter some travelers from using air travel. The other main issue is how to transport people at 760mph without making them want to throw up. Regardless of these issues, Musk and his team have already mapped out a main route for the Hyperloop, along with branch routes and stations that make their way eastward. It is hard to tell how far away we are from seeing a prototype of the Hyperloop, but it is not entirely crazy to think that Musk’s idea is the future replacement of the railway.