3 ms·
The other issue is the bottle-neck of the Isthmus of Panama. _All_ trade between North and South Americas would have needed to transit this corridor, unless so
by wavefunction 10y ago
The other issue is the bottle-neck of the Isthmus of Panama. _All_ trade between North and South Americas would have needed to transit this corridor, unless some more complex system involving Caribbean island-hopping was developed.