The 19th and 20th centuries were marked by great scientific and technological developments. These developments encompassed many different fields like transportation, communication, manufacturing, education, trade, health care and others.
The life of people has become quite comfortable with these scientific innovations as various types of machines have begun to perform complex tasks for them.
There was a time when man used to walk long distances to reach other places for trade and other pursuits. The invention of wheel enabled him to make hand-driven and animal driven carts to transport various types of goods to different destinations.
With the invention of petrol and the engines that could be used it as fuel came different types of vehicles. Cars, trucks, buses, bikes and other road transport means started being made. This was perhaps the greatest scientific development. People could go to long distances and in large number.
They started going to other…
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