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:
“It is thus that the few rare lucid well-disposed people who have had to struggle on the earth find themselves at certain hours of the day or night in the depth of certain authentic and waking nightmare states, surrounded by the formidable suction, the formidable tentacular oppression of a kind of civic magic which will soon be seen appearing openly in social behavior.”
—Antonin Artaud (1896–1948)
““... You could sit there with the stains on your shoes
Of the fresh earth from your own baby’s grave
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You had stood the spade up against the wall
Outside there in the entry, for I saw it.””
—Robert Frost (1874–1963)
“Oversimplified, Mercier’s Hypothesis would run like this: “Wit is always absurd and true, humor absurd and untrue.””
—Vivian Mercier (b. 1919)