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Are We Alone in the Universe? – Hank Green

Alex O'Connor | September 4, 2026



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– VIDEO NOTES

Hank Green (@hankschannel) is one of YouTube’s most beloved creators. One half of vlogbrothers, he is also the co-creator and host of SciShow and Crash Course

– TIMESTAMPS

0:00 – Where Are All the Aliens?
8:02 – What Makes Humans So Special?
18:44 – Has the US Lost its Cultural Identity?
30:57 – Was Martin Luther Wrong About God?
37:52 – Is the World an Illusion?
48:16 – Should We Believe Our Illusions?
55:22 – How Objective is Science?
1:01:03 – Does Science Explain Anything?
1:12:28 – Could We Explain Cold to an Alien?
1:23:26 – The Hard Problem of Consciousness
1:29:06 – Will Computers Ever Become Conscious?
1:37:20 – Do You Have Two Brains?
1:43:52 – Should We Be Worried About TikTok?
1:50:30 – Hank’s Video Ideas
2:01:02 – What’s it Like Meeting Your Old Heroes?
2:07:14 – Being a YouTuber

– CONNECT

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——————————————

Written by Alex O'Connor

Comments

This post currently has 38 comments.

  1. @emilyemm8460

    September 4, 2026 at 10:30 pm

    ….stuff that looks not natural. ……but to us, it would be natural. Because it would have been happening as long as we’ve existed. There could be something we think is ‘normal’ that is actually alien…how would we know??!

  2. @marlofokker

    September 4, 2026 at 10:30 pm

    46:43 Hank, you will never read this, but these flare-ups might be directly tied to your nervous system. Unfortunately, that makes it incredibly hard to track down because our healthcare system is so compartmentalized (e.g., 'stomach hurts? go to a stomach doctor' rather than looking at the whole system). Sometimes people who have endured massive physical or emotional trauma—like cancer and chemotherapy—can have their nervous system get trapped in a repeating state of 'fight or flight' (sometimes called central sensitization), which amplifies pain and fatigue. This is a very brief version of a complex issue, but my only goal is that if you aren't aware of how trauma loops in the nervous system, looking into it might help you find some relief.

  3. @oscartjerrild9689

    September 4, 2026 at 10:30 pm

    1:06:00: I think the answer lies in the question itself, about what science is. Like, what would constitute explanation rather than description to you? It sounds like what you're referring to is either underlying purpose, which presupposes a worldview that the universe has an underlying meaning or purpose. Or you're describing intentionality, which is a very theist presumption when describing stuff like the laws of physics or other natural sciency things. So the underlying question is perhaps whether, if that's your definition of "explanation", explanation of anything is even possible

  4. @jackjacobs1373

    September 4, 2026 at 10:30 pm

    No. We are not alone in the Universe. The observable universe is estimated to contain roughly sextillions of planets. By multiplying an estimated 100 billion to 400 billion stars per galaxy by the roughly 2 trillion galaxies in the observable universe, scientists calculate a total of about 10 to 20 sextillion planets. To believe that our planet is the only one with life must take some awfully difficult mental gymnastics.

  5. @johngaunce

    September 4, 2026 at 10:30 pm

    They have done a study where they test people's moral choices after reading an article suggesting there is no free will, and people act more selfishly and anti-socially. It appears to be an objective fact that people do behave differently when they believe they have no free will.

  6. @qwerkyscience

    September 4, 2026 at 10:30 pm

    I think free will is not the same thing as choice making and we did not have selection to believe in free will biologically. We do make choices and our naivety is what makes it seem potentially "free" but its us discovering the determination of things. We are specifically trying to find the predetermined reality. We did evolve to find that.

  7. @realsavour

    September 4, 2026 at 10:30 pm

    Some questions carry no value. The "why' questions obfuscate between "why" and "how" without any specificity. This has always been the case at any limit, whether it be a mathematical function, or in reality. An example of this is a question like asking "How do I travel north?" While you're standing at the North pole.

  8. @MOSMASTERING

    September 4, 2026 at 10:30 pm

    1:40 If there was no free will and you could explain after why you went to eat because you could invent a story – like, you enjoy the taste of food and wanted to experience it – why would you be given clues to your body's needs, like hunger? I mean, if you were on automatic and just did things because of needs – why would you ever be allowed to experience sensations?

    What is consciousness? It always comes back to the hard problem.. If we have no free will, why be aware and experience anything at all ! I can only speak for myself, but I am aware and self conscious. Maybe in our past or future we will evolve in or out of consciousness.. it could be new or unnecessary now and we lose it. Maybe some people that do better are already NPCs and will pass on more genes.. psychopaths/sociopaths like CEOs, billionaires etc.. they just perform the bare needs of acting out emotion to get by in society in order to exploit it to become the most successful.

  9. @HooptyDoopty112

    September 4, 2026 at 10:30 pm

    I don't know if someone else more famous than me came up with this theory or not, but here's a fun one for the Fermi paradox. Maybe aliens don't come here or contact us or hide from us because they have no concept of fiction. They've just never evolved it. And so when they do their research on us, and they see movies like Star Wars, stuff from Marvel, Harry Potter, Alien, etc. they think it's all our reality and they just simply get absolutely scared shitless of us and what we're capable of, so they just leave us alone and avoid us as much as alienly possible.

  10. @Fabricio-b6x

    September 4, 2026 at 10:30 pm

    We don't see the aliens because they are studying us in the same way we study the jungle, we don't want the lions to know we are here, we want to control the lions in our own interest, well, they do the same

  11. @JerryY-k3t

    September 4, 2026 at 10:30 pm

    People seem to think a book is true cause its old or ancient, yet that can be more reason to chuck it in the shitter can't it. 🎉 remember, always finish on the Bach, never on De Bussy. ❤

  12. @FeonaMom

    September 4, 2026 at 10:30 pm

    I'm not gonna pretend I had it all figured out, because I didn't. Manifesting felt like failing for years. I'd try, get nowhere, tell myself I'd get it next time, and then nothing again. It got to the point where I figured maybe some people just aren't wired for it and I was one of them. Then I took Vera Hart's archetype quiz, kind of as a last thing to try. And it hit something. My archetype just fit, in a way that made me go oh. No fireworks, no life suddenly fixed. But for the first time I had direction instead of just fumbling in the dark hoping something would stick. If you're struggling with it too, honestly, do the quiz. Its free anyway.

  13. @thomaswilburn6263

    September 4, 2026 at 10:30 pm

    6:10 water is too easy. green did a different video on evolution and the idea that we are fish keeping the sea inside of us in a place that wants to bake us dry is relevant here i feel. were always trying to not die so we must advance ourselves. you cant go out into more ocean you have to go up. our precious liquids smdh.

  14. @lrvogt1257

    September 4, 2026 at 10:30 pm

    No test has been conceived to determine if two individuals perceive color the same. We measure the same wavelengths but color is produced by the brain. There is no color in the actual universe outside of brains… just electromagnetic waves of different lengths.

  15. @lrvogt1257

    September 4, 2026 at 10:30 pm

    According to physicist, Brian Cox, we are NOT in the middle size-wise. We are 400,000,000 times CLOSER to the size of the observable universes than to the smallest measurable scale, the Planck length.

  16. @TurdFerguson456

    September 4, 2026 at 10:30 pm

    If people, anywhere in the world, could actually tell the truth about someone they've been manipulated to hate, the world would be better.
    Some of you know exactly what that means, which is good! …but too many others are unwilling to adjust their beliefs, mindsets, or even to do the work to know the truth, even if that work is right in front of their faces. The cult will banish them for walking out of line, or for just thinking about it.
    Check out the UK. Look at what they've been willing to push under the rug and enable for decades. And look at what happens when the truth comes out. The problem there is it's hard to notice anything when there isn't any acknowledgement or effort to adjust. It's almost like acknowledging and doing the right thing would show some sort of admittance of guilt, so they play pretend.
    I'm not going into details for a reason. If you know what I'm talking about, it's very clear. If you have no idea, then you are part of the problem and should at least try to pierce that bubble.

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