Thanks NordVPN for sponsoring this episode! Start protecting yourself on the web at http://www.NordVPN.com/whatif or use code ...

#what if  #what happens if  #scifi  #science documentary  #what if scenario  #biggest questions in science  #what if we build a tunnel between usa and europe  #tunnel in the atlantic ocean  #channel tunnel  #chunnel  #tunnel in the middle of the ocean  #how was the channel tunnel built  #tunnel under the ocean  #how to dig a tunnel under the ocean  #underwater tunnels  #high-speed trains  #floating trains  #what is a vactrain  #vactrains