Rare Earth Hypothesis
This hypothesis states that based on astrobiological findings, multi-cellular life forms found on Earth may actually be more of a rarity than scientists initially assumed. It provides a possible answer to the Fermi paradox which suggests, "If extraterrestrial aliens are common, why aren't they obvious?" It is apparently in opposition to the principle of mediocrity, assumed by famed astronomers Frank Drake, Carl Sagan, and others. The Principle of Mediocrity suggests that life on Earth is not exceptional, but rather that life is more than likely to be found on innumerable other worlds.
The anthropic principle states that fundamental laws of the universe work specifically in a way that life would be possible. The anthropic principle supports the Rare Earth Hypothesis by arguing the overall elements that are needed to support life on Earth are so fine-tuned that it is nearly impossible for another just like it to exist by random chance (note that these terms are used by scientists in a different way from the vernacular conception of them). However, Stephen Jay Gould compared the claim that the universe is fine-tuned for the benefit of our kind of life to saying that sausages were made long and narrow so that they could fit into modern hot dog buns, or saying that ships had been invented to house barnacles.
Read more about this topic: Astrobiology
Famous quotes containing the words rare, earth and/or hypothesis:
“Men are always thinking that they are going to do something grandly wicked to their enemies; but when it comes to the point, really bad men are just as rare as really good ones.”
—George Bernard Shaw (1856–1950)
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Not the mother that held men as they fell
But stone, but like a stone, no: not
The mother, but an oppressor, but like
An oppressor that grudges them their death,
As it grudges the living that they live.”
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“On pragmatistic principles, if the hypothesis of God works satisfactorily in the widest sense of the word, it is true.”
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