In 2016, most people tell time by either using their computer, cellphone, or one of the other various electronic and digital appliances that they have at their disposal; but for most of human civilization, people had to tell time using different methods, which at one point solely included the sun and moon. The clock is actually one of humanity’s oldest inventions, and it has undergone multiple transformations, including the sundial, hourglass, pendulum clock, pocketwatch, and the wristwatches and electronic clocks of today. Some people pay a lot of money for clocks, and in the case of Amazon founder Jeff Bezos, he is spending an obscene amount of money to help build an incredibly large clock. This clock is being built inside of a cave in Texas, and it is expected to tell time for at least a 10,000 year period; and if that alone was not impressive, then you will be pleasantly surprised to know that Bezos (pictured) has spent 42 million dollars on this clock.