Hello, I was watching watch videos lol. I bought a new automatic watch and I was interested to see how they work, here is a nice YouTube video; There are various types of watches / clocks. Sun dial, mechanical, kinetic, quartz and of course atomic. They all, however, measure time kinda independantly of the universe. Like, the universe ticks along and all our clocks try to measure it's ticking, but what if there was a clock that was completly locked to the ticking of the actual universe? A clock, according to the youtube video, requires a power source and the way time is measured conventionally is that the clock measures the flow of energy. So, taking into account the smallest measure in the universe, the Planck Length, along with Planck time (the time it takes light to travel one Planck length) can we create a clock which utilises these indivisible units and so measure time directly? ?? ? Flip, mind blow there!