Wagons are believed to have been first created in western Asia around 3500 BC. Initially, because the wheels were disc-shaped, they were pulled by cattle due to their heaviness. However, after the invention of spoke wheels, horses could pull the wagons because they were lighter. Naturally, there was a big difference between the speed of a wagon pulled by cattle and one pulled by a horse. This led to a decrease in travel time. A minor adjustment to the spoke design sparked a significant change in human civilization. Nearly all innovations start small, but even the tiniest change can have enormous consequences. Many unseen factors contribute to this innovation in our lives. - Joseph’s “just my thoughts”
The tallest mountain in the solar system is Olympus Mons on Mars, towering about three times higher than Mt. Everest. Its area, covering 295,000 ㎢, surpasses the size of the Korean Peninsula (220,850 ㎢) and is nearly equivalent to that of France or Arizona. While Olympus Mons has a greater height than any mountain on Earth, its vast area results in an average slope of only 5 degrees. As a result, hikers who ascend Olympus Mons often feel as if they are traversing a flat plain. For humans, the steepness of a climb matters more than its height. For example, ascending a steeper 5 m pole can be more challenging than gradually scaling a 500 m mountain. In life, choosing the right slope to climb is often more crucial than focusing solely on the height reached, whether going uphill or downhill. - Joseph’s “just my thoughts”