Read the article "swiss create world's longest tunnel." the alps are mountains that serve as a physical boundary between countries in europe. according to the article, the swiss have created the world’s longest tunnel. how will this new tunnel revolutionize transportation in europe and overcome this physical barrier?

The Gotthard tunnel is a 57km (35 miles) long tunnel that took 14 years to be built. It provides a high-speed link between north and south Europe.

It opened in December 2016 and it reduced the travel times, for example, Milan_Zurich travel time without the tunnel was 4:03 hours long and with the tunnel it is 3:26 hours.

The tunnel also increased the passenger crossing in the trans-alpine line in 30%.

norsemen from northern countries had made earlier journeys

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.