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The Drake equation results in a summary of the factors affecting the likelihood that we might detect radio-communication from intelligent extraterrestrial life. [ 2 ] [ 6 ] [ 17 ] The last three parameters, f i , f c , and L , are not known and are very difficult to estimate, with values ranging over many orders of magnitude (see § Criticism ).
Although no extraterrestrial life has been found and life may still be just a rarity from Earth, there are scientific reasons to suspect that it can exist elsewhere, and technological advances that may detect it if it does. [152] Many scientists are optimistic about the chances of finding alien life.
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 December 2024. Problem of the lack of evidence for alien life despite its apparent likelihood This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between ...
The Great Filter is the idea that, in the development of life from the earliest stages of abiogenesis to reaching the highest levels of development on the Kardashev scale, there is a barrier to development that makes detectable extraterrestrial life exceedingly rare. [1] [2] The Great Filter is one possible resolution of the Fermi paradox.
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The impact of discovering life beyond earth. Cambridge University Press. ISBN 978-1-107-10998-8. Ashkenazi, Michael (2016). What We Know About Extraterrestrial Intelligence. Springer. ISBN 978-3-319-44455-0. Vakoch, Douglas (2013). Astrobiology, History, and Society — Life Beyond Earth and the Impact of Discovery. Springer. ISBN 978-3-642 ...
[67] [68] The response further noted that efforts, like SETI, the Kepler space telescope and the NASA Mars rover, continue looking for signs of life. The response noted "the odds are pretty high" that there may be life on other planets but "the odds of us making contact with any of them—especially any intelligent ones—are extremely small ...
Alien life could be found in a tiny grain of ice, researchers have said. The discovery suggests that upcoming telescopes might be able to spot extraterrestrial life relatively soon.