Evolution of Gates

From the timeline, we can learn that it is not only the evolution of gates but also the improvement of human skills and creativity in building a structure. Instead of using wood only, human starts to learn to use iron and steel to make out different shapes and lines to build special and unique items. Later then, the invention of paint beautified the outlook of the gates made it stronger and more permanent towards the climates. After a few decades, human even started to use fragile materials to build a gate not only as a prevention but also as a decoration. They think of ways to make fragile materials can withstand forces towards it and prevent it from breaking. Therefore, from the timeline above, we know that human is keep upgrading to lead themselves to a better, safer and more comfortable life. =)