The document traces the history of transportation from early humans walking to modern airplanes. It discusses the domestication of animals like donkeys and horses around 4000-3000 BC for transport and the invention of the wheel around 3500 BC. Sailing boats and ships were developed by the Egyptians around 3100 BC using reeds and sails. Railways revolutionized travel in the 19th century, and cars, motorbikes, airplanes and other modern forms of transport were invented in the late 19th and early 20th centuries, bringing the world closer together.