Basically the title
In: 7
A bunch of reasons.
1. What IS life? It’s hard to replicate something when we are really not quite sure what IT is. Our understanding of life at the very smallest scales is sketchy, we have some understanding but it’s far from clear how it all works at that scale.
2. We don’t really know what the world was like before life. We have some good guesses, but the specifics are still kinda blurry, and the specifics are how it all began. So we are taking a shot in the dark to figure it out.
3. The very first “life” was probably incredibly delicate. In fact, it probably only survived because there was nothing else trying to survive at the time. Even then it probably had to happen millions or billions of times before it “stuck” and survived. Which probably happened over millions of years of random mixing and chance chemistry.
So, basically, we don’t know what the starting conditions were, we are pretty sure that whatever those conditions were still meant that it took billions of tries to get it right, it was incredibly delicate and broke down insanely quickly, and even if we were able to get it to happen again, we might not even recognize it anyway.
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