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About

The Fermi Paradox refers to the conflict between the high statistical probability of intelligent extraterrestrial life in the universe and the failure of humans to find evidence of their existence. Many hypothetical explanations for the paradox have been proposed, including speculation that humans may be the first and only intelligent life in the universe, that space is too vast for extraterrestrials to traverse or that intelligent civilizations are destroyed prior to leaving their home world.

Origin

In 1950, the physicist Enrico Fermi famously questioned why humanity had failed to document any evidence of extraterrestrial civilizations if a multitude were likely to exist within the galaxy. In 1975, astrophysicist Michael H. Hart published a paper titled "Explanation for the Absence of Extraterrestrials on Earth," which provided an in-depth examination of the paradox.[6]

Drake Equation

In 1961, astrophysicist Frank Drake wrote an equation to estimate the probability of active extraterrestrial civilizations within the Milky Way galaxy. Due to a number of uncertainties, Drake estimated that there were likely between 1,000 and 100,000,000 intelligent civilizations in the Milky Way alone.

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On September 18th, 2009, Xkcd[7] published a comic titled "The Search," in which a sentient ant colony calls off the search for intelligent life after failing to discover other pheromone trails (shown below).

"source":https://xkcd.com/638/

On November 27th, 2012, a page for the Fermi paradox was created on TV Tropes.[2] On March 20th, 2013, the sci-fi blog io9[5] published a listicle titled "11 of the Weirdest Solutions to the Fermi Paradox." In May 2014, the educational blog Wait But Why[3] published an article on the Fermi paradox. On June 4th, Xkcd[8] posted a comic titled "Fish," which speculated that humans have yet to find evidence of extraterrestrials because they are invisible (shown below).

"source":https://xkcd.com/1377/

On April 25th, 2015, the astrophysics blog Quarks to Quasars[4] published an infographic containing various explanations for the Fermi paradox (shown below).

"source":http://www.fromquarkstoquasars.com/10-solutions-to-the-fermi-paradox/

On May 6th, the In a Nutshell YouTube channel uploaded a video titled "The Fermi Paradox – Where Are All the Aliens?", which described the hypothetical Dyson sphere technology and provided various hypothetical explanations for the paradox (shown below, left). On June 4th, a second video was uploaded which included additional explanations for the Fermi paradox (shown below, right).

On September 17th, Edward Snowden was interviewed by Neil deGrasse Tyson on the StarTalk podcast, where he proposed that the Fermi paradox could be explained by encryption techniques used by extraterrestrial civilizations (shown below).

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Fermi Paradox

Fermi Paradox

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About

The Fermi Paradox refers to the conflict between the high statistical probability of intelligent extraterrestrial life in the universe and the failure of humans to find evidence of their existence. Many hypothetical explanations for the paradox have been proposed, including speculation that humans may be the first and only intelligent life in the universe, that space is too vast for extraterrestrials to traverse or that intelligent civilizations are destroyed prior to leaving their home world.

Origin

In 1950, the physicist Enrico Fermi famously questioned why humanity had failed to document any evidence of extraterrestrial civilizations if a multitude were likely to exist within the galaxy. In 1975, astrophysicist Michael H. Hart published a paper titled "Explanation for the Absence of Extraterrestrials on Earth," which provided an in-depth examination of the paradox.[6]

Drake Equation

In 1961, astrophysicist Frank Drake wrote an equation to estimate the probability of active extraterrestrial civilizations within the Milky Way galaxy. Due to a number of uncertainties, Drake estimated that there were likely between 1,000 and 100,000,000 intelligent civilizations in the Milky Way alone.

Spread

On September 18th, 2009, Xkcd[7] published a comic titled "The Search," in which a sentient ant colony calls off the search for intelligent life after failing to discover other pheromone trails (shown below).


"source":https://xkcd.com/638/

On November 27th, 2012, a page for the Fermi paradox was created on TV Tropes.[2] On March 20th, 2013, the sci-fi blog io9[5] published a listicle titled "11 of the Weirdest Solutions to the Fermi Paradox." In May 2014, the educational blog Wait But Why[3] published an article on the Fermi paradox. On June 4th, Xkcd[8] posted a comic titled "Fish," which speculated that humans have yet to find evidence of extraterrestrials because they are invisible (shown below).


"source":https://xkcd.com/1377/

On April 25th, 2015, the astrophysics blog Quarks to Quasars[4] published an infographic containing various explanations for the Fermi paradox (shown below).


"source":http://www.fromquarkstoquasars.com/10-solutions-to-the-fermi-paradox/

On May 6th, the In a Nutshell YouTube channel uploaded a video titled "The Fermi Paradox – Where Are All the Aliens?", which described the hypothetical Dyson sphere technology and provided various hypothetical explanations for the paradox (shown below, left). On June 4th, a second video was uploaded which included additional explanations for the Fermi paradox (shown below, right).



On September 17th, Edward Snowden was interviewed by Neil deGrasse Tyson on the StarTalk podcast, where he proposed that the Fermi paradox could be explained by encryption techniques used by extraterrestrial civilizations (shown below).



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Top Comments

Snickerway
Snickerway

Personally, I think our issue is that we're looking for the wrong things. When looking for signs of extraterrestrial life, scientists tends to look for things like liquid water and carbon, since all Earth life is carbon-based and requires water to live. The problem arises when this standard is applied when searching for life not on Earth. We barely have any understanding of how life formed on Earth as is – how could we possibly know what creatures would evolve if life formed on a planet with totally different conditions? We're searching when we don't even totally understand what we're searching for.

+49
Blargity
Blargity

But in space, we can only see into the past, never the present. If we look somewhere 11 billion light years away, we're looking into 11 billion years ago, and life takes billions of years to evolve. Everything will always be hidden behind the curtain of the past.
Someone who's 4 billion light years away and looking straight at Earth wouldn't see shit.

+42

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