This is one of the interesting article that I came across. I have been amazed the extraordinary innovations and techniques that mankind have created to explore the planet. Architecture was one of the achievement that we should appreciate. Just look at the Great Pyramids of Egypt and the Great Wall of China. Isn't amazing how the people in the past uses the natural resources to build a marvellous marvel without any modern day machineries. A big respect to them...
In this article, it was saying about how humans have came out with the different techniques in digging up the Earth and how the invention of machineries have helped the process to be much more easier and faster.
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