One look at the uncertainties and the assumptions changes the story tremendously.
For more than half a century, scientists have worked to transform the existential question of life beyond Earth from a philosophical inquiry to an empirical one. Sure, we can search for life directly, but as long as that endeavor remains fruitless , the most productive thing we can do is to take an indirect approach.: the first equation to attempt to quantify how many alien civilizations might be present in our own galaxy today.
Even if we consider that many of these worlds may be false positives, more like mini-Neptunes than Earth, or otherwise uninhabitable for a variety of reasons, there are still at least billions of planets that have properties analogous to Earth in our Milky Way right now. We do not know how frequently, once life arises, it takes hold and thrives, sustaining itself for billions of years in an unbroken tree of life.
All we know, if we're being honest, is that things occurred on Earth the way they did, and everything else is nothing more than healthy speculation, at best.ambitions become inevitable. But this is an assumption that isn't backed in science, and we must be careful about any such conclusions we draw from them. highlighting what you should be able to infer about life in the Universe based on what's arisen on Earth.
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