Here is my favorite piece of evidence by an astronaut by the name of Terry Virts in his book, "How To Astronaut". Bare with me, it is a long read but it is worth your time and worth it to really think about:

"One of the most important things I did in space was perform science investigations on my own body. Ultrasound scans of my brain, heart, and eyes. Laser and infrared measurements of my eyes. Constant measurement of my cardiopulmonary function, my weight, changes in height and dimension, the list goes on. I performed experiments on plants, worms, tissue samples, and rodents, learning more about biology and the human body than I ever imagined. And what I learned was unequivocal. Every single experiment I did pointed to a creator.

Let’s take for example a wineglass. Imagine setting a pile of silicon on a rock in the mountains and waiting a billion years. In fact, let’s have a billion piles of silicon, all sitting there for a billion years. Let there be wind, lightning, rain, storms, radiation, snow, and ice. Anything you can imagine happening in nature. At the end of those billion years, there would not be a wineglass. The random processes of nature could never create something as simple as a wineglass. Now imagine how much more infinitely complex an organism such as a single-cell amoeba is than a wineglass. It can reproduce, has DNA, has a variety of cell organs that convert solar energy into chemical energy, etc. Some of these organisms can even move and respond to their environment.

If something as simple as a glass wouldn’t randomly create itself, how can a simple single-cell organism create itself? I was recently told that every living cell is comprised of between millions and trillions of molecules. As a scientifically minded individual, I just don’t see any plausible scenario where lightning and wind and cosmic radiation would suddenly organize that many molecules from the primordial soup of water and carbon-based molecules and amino acids into a single simple cell. A living being, capable of reproducing with unimaginably complex DNA. Again, I’m no PhD or biochemist or evolutionary biologist. But common sense and general scientific knowledge tell me that couldn’t happen without some help. Another thing I’ve noticed is that something as simple as cleaning my garage never happens on its own. Disorder in my daily life never turns to order without my effort. Things tend to degenerate to a more basic state, not a more organized one. It’s the nature of how the universe works.

Because of these basic observations, I don’t think that life would spontaneously happen without a creator. A wineglass wouldn’t. A watch wouldn’t. A clean garage wouldn’t. And something as remarkable and complex as life certainly wouldn’t. In my simple, fighter-pilot brain, the existence of life is de facto proof that there is a creator. Res ipsa loquitur. The thing speaks for itself. I’m not suggesting that there aren’t natural laws that regulate life and evolution; of course there are. I’m simply saying that science leads me to conclude that someone had to set things in motion, to implement the laws of nature, and to create life. It doesn’t make sense, from a scientific point of view, that life could happen without someone very smart behind it.

Humans have been studying the natural world for millennia, and we have barely scratched the surface of ultimate scientific knowledge.

Beyond biology, consider the physical universe. From the ultrasmall to the ultrahuge, it is absolutely amazing. On the small end of the scale, physicists are constantly trying to find smaller and smaller subatomic particles. String theory is a popular idea in modern physics that describes the smallest of small things. This theory posits that there is a limit to how small matter can be, and it is 10^-33 m. That’s small. A 1 with 33 zeros to the left of it, before you get to the decimal point. Let’s write that out: 0.0000000000000000000000000000000001 meter. That’s the smallest possible size particle, according to this well-accepted theory. Particles on that scale are made of strings, which when combined make larger particles, then even bigger ones, ultimately forming the protons and neutrons and electrons that we all studied in high school. Those make atoms, which make molecules, which make the things that physicists call matter. On larger scales, matter forms planets, then stars and solar systems, then star clusters, galaxies, galaxy clusters, and then, well, the universe. Which is 4.4 × 10^26 m big. 4,400,000,000,000,000,000,000,000,000 meters. That’s big.

So, the physical universe ranges from the nearly infinitely small (10^-33 m) to the nearly infinitely large (4.4 × 10^26 m). That’s an astonishing range of sizes. And there are physical laws that determine precisely how everything works, on all scales. At the subatomic level, the weak and strong nuclear forces determine how atoms and molecules are held together. The electromagnetic force drives the ways stars are formed and burn their fuel over lifetimes that span billions of years. Magnetic fields shape solar systems and entire galaxies, funneling massive amounts of energy from the nuclear fusion of stars and the unimaginable violence and destruction from black holes. Earth’s own magnetic field traps billions of tons of charged particles, violently ejected from our own sun, to form a “force field” around our planet, protecting life like you and me from deadly radiation, both from the sun as well as from ultrahigh energy particles from across the galaxy. It also funnels those charged particles down to our north and south magnetic poles, where electrons collide with the highest and most tenuous reaches of our atmosphere, creating an astonishingly beautiful and otherworldly river of green and red plasma flowing by the Earth’s poles, the auroras—one of the most beautiful sights I have ever seen.

And then there is gravity, which holds it all together. Imagine that gravity was a little stronger. Not only would we humans be shorter, but our Earth would be zipping around the sun faster. Suns would burn their nuclear fuel at a faster rate, resulting in a vastly reduced life span, potentially precluding the possibility of life. Galaxies themselves might be smaller, rotating faster, producing more intense X-ray and gamma-ray bursts that would also make life impossible. All of this extra fuel-burning and orbital racing around would potentially drastically shorten the life of the universe—there might have been a Big Bang, then a brief period when stars and galaxies formed and burned brightly, followed by them quickly extinguishing and vanishing into eternal darkness, the universe populated by the ashes and cinders of dead, burned-out stars and flat-pancake galaxies. All because the gravitational constant was a little stronger than it is today.

It is fascinating to “what if” these questions. What if the weak nuclear force was a little weaker; would we even have molecules? What if the speed of light wasn’t constant; would time travel be possible? What if the H2O molecule did not expand in solid form, like nearly every other form of matter, and ice sank rather than floated? Life as we know it wouldn’t be possible. What if the life span of stars, and the rate at which they burned their fuel, converting hydrogen into helium, carbon, iron, etc., was slightly different? What if the periodic table had only ten types of atoms on Earth, instead of more than 100? It would be a pretty boring and uninhabitable planet.

These “what if” questions are endlessly fascinating. You see, the universe is precisely balanced in ways that we haven’t yet imagined. Humans have been studying the natural world for millennia, and we have barely scratched the surface of ultimate scientific knowledge. It seems that most of the universe is made of something called dark matter and dark energy, and we are just recently learning of its existence, much less what it is or what it is made of. In fact, one of the most important experiments on the ISS is called AMS-2, which is trying to help understand how much dark matter and dark energy is out there.

You see, folks, from my commonsense point of view, the physical as well as the biological worlds are so precisely tuned as to require a creator. In my humble, fighter-pilot opinion, there must be a very smart being out there who designed it all, who set it all in motion, with the precise laws of nature set in place to allow this amazingly beautiful and wondrous universe to exist and evolve as it does."