Sciencecalendar_todayLast updated: Apr 2026
What is Fermi Paradox?
/ˈfɜːmi ˈpærədɒks/
The apparent contradiction between the high probability of extraterrestrial civilisations existing in the universe and the complete lack of evidence for, or contact with, any such civilisations.
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Everyday Example
There are 400 billion stars in our galaxy, many with planets in habitable zones. Even if only 0.1% developed life, that's 400 million civilisations. So where is everyone? That's the Fermi Paradox.
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“SETI (Search for Extraterrestrial Intelligence) has scanned the sky for radio signals for over 60 years. Despite finding a universe full of planets, we've detected no clear signs of intelligence beyond Earth.”
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Did you know?
Physicist Enrico Fermi posed the question "Where is everybody?" during a casual lunch conversation at Los Alamos in 1950. It became one of the most profound unsolved questions in science.
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Key Insight
The silence of the universe may itself be data. Some theorists suggest it points to a "Great Filter" — some barrier that civilisations rarely survive. Whether that filter is behind us or ahead of us is one of the most consequential open questions.
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