Map reveals how the entire world could be connected using a global underground network [impactlab.net]
Such a project would need an almost unlimited budget and time to create tunnels long enough to cross the Atlantic, he added.
Super high-speed vehicles would also need to be developed in order to make a trip beneath the ocean comparable to taking a flight.
And then there are tectonic plates and enormous underwater mountain ranges to consider.
Mr Benaim said: ‘The idea of tunnelling under the ocean is probably not feasible because of the depth of abysses and tectonic plate boundaries. I suppose you could go round Greenland and the Arctic [to connect Europe with America].
His suggested solution to the Atlantic problem is quite simple, however.
‘Why should we imagine this map and network as an underground?’ he said.
He explained that a pneumatic tube similar to the grand plans for a 760mph (1,223km/h) ‘hyperloop’ in California might be more feasible.