Space.com has posted a set of five short videos which discuss the meaning of time from the perspective of humans, our planet and the cosmos. The videos emphasize that time is no abstract. It is above all a natural process, which embodies the nexus between our minds and the environment. This is something I have discussed in a previous post, here. Beyond that, time is the measure of all life interacting with the environment; and finally, it is the very rhythm of the universe.
Time is an interconnected metric, whose elements of non-life and life are indistinguishable. Everything dies, the video promises, including things in the universe that are not alive. You cannot have life without death. But can you have death without life? Yes, you can. We live in the stellar era, a time defined by the power of stars. But all stars die. According to Stephen Hawking, even Black Holes die, radiating energy until they disappear. And what will happen when they do? Finally, the universe will die - unless there are dimensions beyond the ones with which we are familiar, a world beyond perception and beyond death:
See the video one on human time (here); video two on Earth time (here); video three on cosmic time (here); video four (here); and see the fifth video in the series below the jump.Based on Hawking's theory, the last Black Holes will disappear when the cosmic clock strikes 10 to the 100th years from now. That's a number known as a Googol. That's the end of our universe, and yet it's still far short of forever. What will happen, say, in 10 to the Googol? A Googolplex years? Well, if you wrote all those numbers out, in tiny one point font, it would stretch beyond the diameter of the observable universe. Will the great Arrow of Time ever come to rest? Or, does that Arrow fly a curved path, destined to cycle back again and again, as whole new universes come into being in a way similar to our own. The numbers that describe the time horizons of our universe are incomprehensible. Yet they may well be relatively insignificant in the grand scheme of things.
Episode Five: On the End of Time, How the Universe will Die