Fair enough. Maybe it's outside of the scope of this thread and it belongs in philosophy but it is a mystery trying to comprehend our own existence and how we got started and whether other lifeforms "if" they exist are governed by the same rules.
Did we on earth get a specialised program that is so intricate we were intended to be misled on a path that could never be followed? We could just make the simplest deduction and say everything is as it is, but Occam's razor can be flawed too given context. I'm just not sure of anything yet.
Let’s put it this way, the odds of complex or intelligent life existing are insanely low. The more you look into it, the more it feels like pure cosmic luck that we’re even here.
Humans, in some evolved form, have only been around for about 6 to 9 million years. Earth has been orbiting the Sun for 4.6 billion years, and life first showed up roughly 3.5 billion years ago. Complex life didn’t appear until much later, around 580 million years ago during the Ediacaran period. That was followed by the Cambrian Explosion about 541 million years ago, when life diversified at an incredible pace. Some newer evidence even hints that complex life might go back over 2 billion years, which really changes how we view evolution’s timeline.
Here’s the eerie part. Earth’s history is filled with mass extinctions. Life has been reset multiple times, sometimes every 26 to 30 million years by some estimates. Each time, almost everything gets wiped out, and evolution starts over from small surviving pockets. As the solar system stabilized, these events slowed down to about once every 80 million years. The last big one was 66 million years ago, the asteroid that wiped out the dinosaurs and around 75 percent of all life. Statistically, we’re kind of due for another.
For life to evolve and advance, you need ridiculously long, stable periods between these resets. Even small disruptions like a nearby supernova, massive volcanic activity, an asteroid impact, or being flung out of your solar system can ruin everything.
People really underestimate how finely balanced Earth is. We’ve got a large molten iron core that powers a strong magnetic field through the geodynamo effect, which protects us from deadly solar winds and cosmic radiation. That same field also helps preserve our atmosphere, something Mars lost when its core cooled.
Then there’s our moon. It’s the fifth largest in the solar system, but proportionally the biggest compared to its planet. That’s huge. It stabilizes our axial tilt, which gives us seasons and keeps the climate steady. Without that tilt, Earth might be a frozen rock on one side and a scorched wasteland on the other. The moon is slowly drifting away, about 3.8 centimeters per year, but it’ll take billions of years before it truly escapes.
And that’s just local stability. You also need galactic stability. Stars explode, radiation storms sweep across space, and galaxies collide. The Milky Way itself is on a collision course with Andromeda in about 4 to 5 billion years. Luckily, stars are so far apart that the odds of a direct hit are tiny, but it still shows how fragile our setup is.
When you add all this up, Earth starts looking like an astronomical miracle. The right distance from the Sun, the right size, the right atmosphere, the right moon, the right core, everything lined up just right. This is basically the Rare Earth hypothesis: microbial life might be common in the universe, but complex, intelligent life like us is extremely rare because the conditions have to be absurdly precise.
So maybe there’s other life out there, maybe tons, maybe none. The odds point both ways. But when you realize how many things had to go exactly right for us to exist, it’s hard not to think we hit the cosmic jackpot.
And then comes the big philosophical question. What’s the point of all this? Are we here by sheer dumb luck, or is there some deeper purpose? We try to make sense of it, but the truth is, we don’t really know, and that drives us nuts. We crave order, meaning, and patterns. But making stuff up just to feel better doesn’t help. Sometimes you just have to sit back, look at the universe, and admit it’s hostile, unpredictable, and unbelievably special that we even get to be a small part of it.