What were the main milestones in transportation?

Answer 1

Key milestones in transportation include the development of the wheel around 3500 BC, which revolutionized land travel. The advent of the steam engine in the 18th century enabled the rise of railroads, significantly enhancing the movement of goods and people. The introduction of the automobile in the early 20th century transformed personal mobility, while the creation of commercial aviation in the mid-20th century further shrank global distances, making international travel more accessible. Each of these innovations fundamentally changed societal dynamics and economies.