Imagine being able to reach New York from London in just one hour. That fever dream could one day be possible after a proposal to build a 3,000-mile trans-Atlantic train tunnel connecting the cities ...
It once took Concorde around 3.5 hours to whisk passengers from London to New York at the height of its fame. The supersonic aircraft was able to travel at a cruising speed of Mach 2.02 - roughly ...