The Wonders of Eternal Infinity.

To say the least, we are incredibly tiny in this universe. We are, as illustrated in the above presentation, but specs of sand on a larger spec of sand, and the sheer size of the universe in its entirety is almost enough for me to contemplate the idea that humanity is almost entirely meaningless, and with ample cause.
These words would seem hollow and empty of any literal realism if it weren't for my posting of the above video, I myself being aware of the generalized workings of the human mind, especially when it comes to the attempt to perceive things as large and incredibly infinite as the existence in which we, well, exist, which I'll admit, deep thought on the subject has kept me up and night, and sometimes I have even found myself fearful of this endless infinity, almost coming to a point of understanding with people who are automatic to believe in a God, which by default gives them a sense of reason for their being, which on occasion I find myself questioning in regards to my being, which, once again, can frighten me on occasion when I realize that, even if I am remembered by generations of human minds to come (a big 'if,' just for those who might take that as an ego-maniacal remark, when in fact I'm simply using it to measure scale), the universe, not to mention the galaxy and our solar system, will see absolutely no significance in what I have done, what I am doing, and what I will do over the duration of my time on this planet of ours, and that goes for anyone and everyone that has existed, does exist, and will exist, no matter how big or small they did, do, or will perceive themselves to be. Here's the ugly truth everyone: you are nothing to the bigger picture. You may be something to the Earth, but in all truthfulness, the Earth is nothing to the entire universe; infinity could care less whether Earth or any other life exists/existed.

Your existence is biological. Whether there is an everlasting soul or the likes is not mine to say, because I truly don't know... but if there is an everlasting soul, it exists within every living thing in infinities entirety; it wouldn't apply only to humans, as some religions would like us to believe.
There is no real reason to fear death, despite the fact that all of us are likely to at some point in our lives, as death is exactly what it was like before you were born, and I doubt anyone suffered any inconvenience from that.

In all honesty, what makes up our physical being will exist forever in different forms. For example: say that when you die, your remains are buried in a cemetery under six feet of dirt. Eventually, those remains will decompose, with everything but your bones dispersing into the earth (usually prior to the coffin, in which the decomposition of the muscle and tissue being degraded to the extent that they are able to slip through the wood of the coffin).
After many more years (which can be thousands upon thousands of years, depending), the bones will eventually decompose as well, or break up and disperse.
If you haven't yet heard, there will come a time when life on Earth will end, due to complications presented by the sun (but don't worry, this won't be for another few billion years from now, as scientific estimates tell us), and eventually, the Earth will be swallowed-up by a sun in its final catastrophic breaths of existence, to be lost forever as dust, dirt, and rocks condemned to eternally float throughout the empty, infinite void of outer space.
As such, what's physically left of what you were once made out of will be a part of this dispersing dust of what was once the home of humankind, as well as all known life in our solar system.
This ultimate reality goes for the physical remains of every living thing on this planet, not just humans, for those of you who may have gotten stuck in the frame of thought pertaining to only humanity. It's really something to think about... The irrefutable truth that, technically, what we once used to roam this planet will exist forever in one way, shape, or form. Whether a soul truly leaves our body to enter another, or enter a realm of eternity, is an entirely different discussion within itself, and I don't claim to know whether the soul is real or not. It's not mine to say.

I, just as you and everyone else, will discover the truth someday.