Fermi Paradox: Where Are the Aliens?

Warm Greetings to All, (sorry for the short notice)
Join Plato's Cave philosophers, Orlando Stoics and CFA Explorers on Zoom this Sunday morning, Feb. 15, 2026 at 9:00. (Informal chat at 9:00, forum at 9:15)
Explorers can reserve a place and receive zoom login information on this site and receive e-mail confirmation.
Our meeting starts at 9:00 AM with friendly wakeup chat; then our select panel briefly introduces the subject at 9:15 AM, followed by member discussion and Q&A.

A link will be shared to members who RSVP.
Fermi Paradox: Great Silence? Great Filter(s)? Ascended or interdimensional Aliens?
To prepare for this dialogue, members are encouraged to at least check out this excellent concise summary that explains most fundamental aspects of the paradox well with some helpfully illustrative graphical diagrams:
https://waitbutwhy.com/2014/05/fermi-paradox.html
Additionally, for anyone extra passionate about this topic looking for an extremely deep and thorough dive into Fermi Paradox related terminology as well as analyses of prospective solutions, this video is a great resource:
https://www.youtube.com/watch?v=uZlhJsEJYXw&t=341s
𝙸𝙽𝚃𝚁𝙾𝙳𝚄𝙲𝚃𝙸𝙾𝙽:
We'll give an overview of the Fermi Paradox: 𝚒.𝚎. the apparent contradiction between the high probability of extraterrestrial civilizations existing given the vastness of the observable cosmos (per most estimates in the Drake Equation) versus the lack of clear evidence or undeniable contact with alien life yet (the “Great Silence”) — as well as the importance of considering multiple potential explanations for the Fermi Paradox plus its implications for our understanding of the universe and humankind’s place in it!
👽𝑻𝒉𝒆 𝑮𝒓𝒆𝒂𝒕 𝑺𝒊𝒍𝒆𝒏𝒄𝒆 versus 𝑻𝒉𝒆 𝑫𝒓𝒂𝒌𝒆 𝑬𝒒𝒖𝒂𝒕𝒊𝒐𝒏 ≐
𝑁 = 𝑅∗ • 𝑓ₚ • 𝑛ₑ • 𝑓ₗ • 𝑓ᵢ • 𝑓𝑐 • 𝐿
𝑅∗ = the average rate of star formation in our Galaxy
𝑓ₚ = the fraction of those stars that have planets
𝑛ₑ = the average number of planets that can potentially support life per star that has planets
𝑓ₗ = the fraction of planets that could support life that actually develop life at some point
𝑓ᵢ = the fraction of planets with life that actually go on to develop intelligent life (civilizations)
𝑓𝑐 = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space
𝐿 = the length of time for which such civilizations release detectable signals into space the “educated guesses” estimated by Drake and his colleagues back in 1961 were:
𝑅∗ = 1yr⁻¹ (1 star formed per year, on the average over the life of the galaxy; this is a conservative estimate)
𝑓ₚ = 0.2 to 0.5 (one fifth to one half of all stars formed will have planets)
𝑛ₑ = 1 to 5 (stars with planets will have between 1 and 5 planets capable of developing life)
𝑓ₗ = 1 (100% of these planets will develop life)
𝑓ᵢ = 1 (100% of which will develop intelligent life)
𝑓𝑐 = 0.1 to 0.2 (10–20% of which will be able to communicate)
𝐿 = 1000 to 100,000,000 communicative civilizations (which will last somewhere between 1000 and 100,000,000 years)
Inserting the above minimum numbers into the equation gives a minimum 𝑁 of 20, whereas inserting the maximum numbers gives a maximum of 50,000,000. Thus, Drake stated that, given the uncertainties, the original meeting estimated that 𝑁 ≈ 𝐿, and there were perhaps approximately between 1000 ↔ 100,000,000 planets with civilizations in the Milky Way Galaxy…
https://www.universetoday.com/39966/drake-equation-1/
👽𝑻𝒉𝒆 𝑮𝒓𝒆𝒂𝒕 𝑺𝒊𝒍𝒆𝒏𝒄𝒆
And yet we must consider the possibility that (assuming some do exist within a range we could hypothetically detect) advanced extraterrestrial civilizations have seemingly chosen to remain silent＆undetected (despite the difficulty of keeping certain things stealthy). Among other possibilities, this could be because:
◎ They're somehow stealthily avoiding cultural contamination? Or simply communicate or produce detectable signatures of sorts or on wavelengths we're failing to consider — or are not yet capable of detecting?
◎ “Dark Forest” theory: self‑preservation and avoiding interstellar conflict?
◎ A “Prime Directive” of noninterference or a Technological or social／ethical threshold before contact?
◎ “Zoo Hypothesis” or Quarantine, Simulation, potential nature or roles of 𝚄𝙰𝙿 Alien spacecraft?🛸 etc.
◎ ethical considerations of “silent” alien civilizations; xenophobia? uplifting? panspermia? etc.
◎ First Contact／Disclosure: a monumental moment that would have huge implications for our own cultural＆technological development?
◎ Considerations of any universal rights or respect for emerging／indigenous civilizations? Or would we be to Advanced／Ascended Aliens as ants or rodents are to us?
𝑮𝒓𝒆𝒂𝒕 𝑭𝒊𝒍𝒕𝒆𝒓𝒔 as well as 𝘓𝘦𝘴𝘴𝘦𝘳 𝘍𝘪𝘭𝘵𝘦𝘳𝘴
We'll ponder the concept that there may be one or more stages or prerequisite‑conditions necessary for the development of intelligent life beyond which civilizations can seldom or almost never manage to progress… and attempt to evaluate or rank some of these which've been proposed.
Some candidates for “Filters” could include:
⌥ biological or evolutionary barriers to the emergence of intelligent life
⌥ “Rare Earth” or “Early Earth” hypotheses and the planetary conditions required for complex life?
⌥ the role of various contingencies in the evolution of intelligent species…
⌥ self‑destruction through warfare or environmental collapse (considering lessons from Earth’s history such as the Cold War era)?
⌥ the importance of international cooperation in avoiding global catastrophes, particularly until we become a multiplanetary species
For an extremely thorough deep‑dive into exploring most of the most plausible candidates for potential great‑filters, I’d highly recommend this video series by Isaac Arthur, who is a brilliant futurist and serves as President of the National Space Society:
https://www.youtube.com/playlist?list=PLIIOUpOge0LuzO1f6z-sCZFawM_xiMHCD
👾“𝑨𝒔𝒄𝒆𝒏𝒅𝒆𝒅” 𝒐𝒓 𝒊𝒏𝒕𝒆𝒓𝒅𝒊𝒎𝒆𝒏𝒔𝒊𝒐𝒏𝒂𝒍 𝑨𝒍𝒊𝒆𝒏𝒔?
⌥ Next we'll consider that extremely advanced extraterrestrial civilizations may've evolved to a point where they are unrecognizable or incomprehensible to humans… yet we'll attempt to expand our understandings of what forms such aliens could potentially take…
⌥ 𝙣𝙤𝙣‑𝙘𝙖𝙧𝙗𝙤𝙣‑𝙗𝙖𝙨𝙚𝙙 𝙡𝙞𝙛𝙚 or alternative‑biochemistries? silicon? XNA instead of DNA or RNA? extremophiles? sulfur? ammonia or methane or ethane solvents instead of water? (such as in liquid form on Saturn’s moon Titan)
⌥ Finally, what about the possibilities of 𝙝𝙞𝙜𝙝𝙚𝙧 𝙙𝙞𝙢𝙚𝙣𝙨𝙞𝙤𝙣𝙨 or realms beyond current human detection／access where aliens could've originated from, or have ascended／escaped to, and could primarily reside in…
𝙲𝙾𝙽𝙲𝙻𝚄𝚂𝙸𝙾𝙽:
We'll speculate which might ultimately prove the most fruitful avenues of continued research＆observation in the search for extraterrestrial intelligence…
Perhaps we can also consider what sorts of evidence might confirm or rule out various explanations for the Fermi Paradox — or what sorts of newly emergent scientific discoveries or technologies could aid our search for aliens (𝚂𝙴𝚃𝙸) or shed more light on the Fermi Paradox in the foreseeable future…
Finally, if some of us lean toward favoring some particular preferred solution that we provisionally suspect may be the most likely to be true, we could briefly share any insights into what implications that solution would have (if true) for humankind’s place in the universe and the nature of intelligence itself…
𝙿. 𝚂.🚀
Regarding the significant consideration of the immense distances involved in potential interstellar travel／contact with aliens if 𝙵𝚃𝙻 travel is not possible, nor some sort of interdimensional wormhole or quantum teleportation／remote‑reconstitution to somehow circumvent these distances, etc… this video explores the logistics of “Crawlonizing The Galaxy: 𝚒.𝚎. Settling‑Space at Ultra‑Low Speeds” (such as 1% light‑speed)… Regards, B.F. Griffith
https://www.youtube.com/watch?v=FpXwyDWDww8
Hosted by:
Plato's Cave and Orlando Stoics and CF Explorers
https://www.meetup.com/platoscave/
Orlando Stoics are Welcome