We explore various proposed resolutions, including the possibility that intelligent life is only listening to the cosmos, and not messaging.
, we looked at some of the proposed resolutions to the Fermi Paradox made in the past few decades. These included the possibility that humanity is alone in the Universe, that intelligent life is periodically wiped out , and that it may be avoiding contact with humanity. Today, we will examine other proposed resolutions and what makes them appear likely .
Researchers from the Harvard-Smithsonian Center for Astrophysics explored this possibility in a 2016 study, arguing that the probability of life in our Universe grows over time. However, low-mass stars can remain in their main sequence for up to trillions of years. Based on their analysis, they concluded that the probability of life on planets orbiting red dwarf stars increases exponentially over this amount of time.The study is consistent with what we know about the emergence of life on Earth and the long-lived nature of M-type stars. It also challenges one of the biggest assumptions about life in the Universe by rejecting the idea that life emerged long ago.
This is the essence of the “Percolation Hypothesis,” which argues that civilizations that attempt interstellar exploration and settlement will not expand uniformly or exponentially. Instead, they will “percolate” outwards, settling in some areas while failing to do so in others. This process will leave much of the galaxy unsettled.
However, these speculations are still useful. Theoretical predictions about what advanced ETI will look like – which is to say, what technosignatures they will produce – allow scientists to constrain and widen their searches. And while any proposed resolution to the Fermi Paradox is subject to bias, some are arguably more realistic.
Another common argument is that humanity is not searching for the right biosignatures, technosignatures, or in the right places. As David Brin told Interesting Engineering, the search has evolved considerably since“The Drake Equation was always intended to lay on the table various topics for discussion or research. Frank never meant it as a predictive scientific formulation. For 25 years, we’ve confirmed that planets are abundant.
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