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What If Alien Life Was Silicon-Based?

What If | November 16, 2025



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Thumbnail from the amazing short about silicon based life by zeyi (泽亿): https://youtu.be/iUdNk5LYj70

https://www.behance.net/gallery/87268925/Primitive-THE-CONCEPT-ART-OF-SILICON-BASED-LIFE

There are billions of planets in the Universe that, theoretically, can support life. But so far, we haven’t discovered any aliens out there. Maybe the reason is we’re just looking in the wrong places. What if alien life isn’t anything like the life we know of? What if it doesn’t need water? Or oxygen? What if it can withstand incredibly hot temperatures? Or very acidic environments? And what would we need to search for to finally find it?

Watch more what-if scenarios:
Planet Earth: https://www.youtube.com/watch?v=_-HhCwYD7rc&list=PLZdXRHYAVxTJCzxwmCq0NNpYq9N9wyb2l
The Cosmos: https://www.youtube.com/watch?v=gfuJyVkMH_g&list=PLZdXRHYAVxTJno6oFF9nLGuwXNGYHmE8U
Technology: https://www.youtube.com/watch?v=CS3bBO05fpU&list=PLZdXRHYAVxTIeRY3JtgXgoGqSEB7kDdKO
Your Body: https://www.youtube.com/watch?v=QmXR46TrbA8&list=PLZdXRHYAVxTJNsV9FFeNAKl2ySsHj8GZO
Humanity: https://www.youtube.com/watch?v=fdCDQIyXGnw&list=PLZdXRHYAVxTIFnvmOeWbv-Mt8zFxSCSvZ

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What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure — grounded in scientific theory — through time, space and chance, as we ask what if some of the most fundamental aspects of our existence were different.

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Comments

This post currently has 43 comments.

  4. @HagathaHexMe

    November 16, 2025 at 2:54 am

    Vice versa, carbon life could only exist on a planet with an ocean of H2O, which can only exist in liquid form in a certain temperature range. Thus the idea of carbon based life would be difficult to imagine for a silicon based lifeform that lives on an oxygen-less planet with liquid methane oceans and what we would consider sub-zero temperatures.

  6. @calvinmasters6159

    November 16, 2025 at 2:54 am

    Silicon life couldn't happen.
    True, silicon has the same number of covalent bonds as carbon, but silicon compounds are rocks and crystals. There can't be a rich, primordial soup where exotic chemistry can happen.

  9. @prihsarnianto8804

    November 16, 2025 at 2:54 am

    Silicon cannot be extracted from atmosphere—unlike carbon, no silicon compound is in gas form…

    So the cycles of silicon cannot be as complete as that of carbon, making silicon-based organism theoretically impossible.

  14. @SanattanAdam

    November 16, 2025 at 2:54 am

    Genetiğimiz kalsiyum, demir yerine; daha fazla silikon, bor, gümüş, altın, bakır kullanıyor olsa zekamız ve görsel kabiliyetlerimiz daha gelişmiş olurdu.

    Silikonun beyin fonksiyonları ve hafıza üzerinde olumlu etkileri olabileceğine dair araştırmalar mevcut.
    Örneğin, bazı çalışmalar, silikonun Alzheimer hastalığı gibi nörodejeneratif hastalıkların riskini azaltabileceğini gösteriyor.
    Silikatlar, diatomlar gibi bazı organizmaların iskelet yapısında bulunur ve bu organizmaların karmaşık desenler oluşturma yeteneği dikkat çekicidir. Bu, silikonun karmaşık yapıları destekleme ve bilgi işlemede rol oynayabileceğini düşündürmektedir.
    Bor, beyin gelişimi ve fonksiyonları için önemlidir.
    Bor eksikliği, bilişsel işlevlerde ve hafızada bozulmaya neden olabilir.
    Bazı çalışmalar, bor takviyesinin bilişsel performansı, özellikle de hafızayı ve dikkat süresini artırabileceğini göstermektedir.
    Gümüş, sinir sisteminde önemli bir rol oynayabilir.
    Gümüş nanopartiküllerin, sinir hücrelerinin büyümesini ve onarımını teşvik edebileceğine dair araştırmalar var.
    Gümüşün antioksidan özellikleri, sinir hücrelerini hasardan koruyabilir ve bilişsel fonksiyonları destekleyebilir.
    Altın, biyolojik olarak inert bir element olarak kabul edilse de, son yıllarda altın nanopartiküllerin çeşitli biyolojik aktivitelere sahip olduğu keşfedilmiştir.
    Altın nanopartiküllerin, sinir hücrelerinin iletişimini ve sinyal iletimini etkileyebileceğine dair araştırmalar var. Bu, altın nanopartiküllerin bilişsel fonksiyonları ve görsel algıyı etkileyebileceği ihtimalini ortaya koymaktadır.
    Bakır, sinir sisteminde sinir iletimi ve nörotransmiterlerin sentezi için gereklidir.
    Bakır eksikliği, bilişsel işlevlerde ve görsel algıda bozulmaya neden olabilir.
    Bakır, miyelin oluşumunda da rol oynar, bu da sinir sinyallerinin daha hızlı iletilmesini sağlar. Bu, bakırın görsel işleme hızını ve verimliliğini artırabileceğini düşündürmektedir.
    Sonuç olarak; mevcut bilgiler, silikon, bor, gümüş, altın ve bakır gibi elementlerin beyin fonksiyonları, sinir sistemi ve görsel algı üzerinde potansiyel olarak olumlu etkileri olabileceğini düşündürmektedir. Bu elementlerin genetik yapımızda daha fazla kullanılması, zeka ve görsel yeteneklerimizi geliştirebilir. Ancak, bu konuda daha fazla araştırmaya ihtiyaç vardır.

  15. @markpalka6382

    November 16, 2025 at 2:54 am

    The laws of chemistry are universal, as are the laws of physics! And compared to
    the carbon-carbon bond, the silicon-silicon bond is prohibitively weak! Therefore,
    life based on silicon cannot possibly exist! And there is a big difference between
    science fiction and science fact, in spite of what such as Star Trek (which is very
    good science fiction) might lead people to believe!!

  19. @TokraRoch

    November 16, 2025 at 2:54 am

    The tetravalence of Si is where the similarities to C end. Silicon-based macromolecules simply cannot exist to form long polymers, stable enough for life to form. Silicon is larger, has larger bond lengths (compared to carbon bonding), the bond angles are different (severely limiting large molecular scaffolds), and the thermodynamics dictate MUCH more energy to form Si bonds, as compared to carbon. In an environment where both C and Si exist, carbon would win out due to these thermodynamic concerns. IF a silicon-only environment would exist (which would be weird and not expected, since Si is made later in atomic processes than carbon), macromolecules simply wouldn't be possible. This is not new stuff, and has been known for decades, with many research papers and reviews discussing this topic.

Comments are closed.

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