What Would Aliens REALLY Look Like?
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- Опубликовано: 21 авг 2024
- The life on Earth is the ONLY example of life we currently have in the entire Universe. What can evolution and the variety we see in Earthlings tell us about what alien life could look like? Turns out, not necessarily much like many of the aliens we see in fiction.
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Clear, concise, zero superlative nonsense. Properly researched and clearly understood. Subscribed.
It is a crime that your channel only has 15,000 followers. This is good stuff, thank you so much.
The content you put out is always so good! Especially for a channel as young as this one
The segment on Portia spiders reminds me of Children of Time. What an amazing book. I never looked at those beautiful little spiders the same way after reading it.
"..evolution as we know it is a process that does not strive for complexity or intelligence," you are so spot-on! I share this thought w/ you and it is parallel to my conclusions about this subject matter. Also, I love your videos and the content you share is very engaging, informative and entertaining. Really well done! Also, great job in narration.
Great content as always thank you:)
Very cool videos, it's going to be fun watching your channel blow up now that the algorithm found you. Best of luck!
I'm starting to believe that the greatest great filter is the creation of life from non-life. If everything on Earth evolved from the first single celled creature then that means that no new life has begun since then. So even on Earth it's such a rare event that we may actually be the only planet that has managed it so far.
It's actually a bit more complicated than that. There is one Last Universal Common Ancestor, but that doesn't mean there were no other forms of life, they just couldn't adapt like LUCA has and evolution has continuously built upon older "designs" (going all the way back to LUCA) to get where we are now.
LUCA existed so long ago that it's likely that any alternative life forms went extinct because our distant ancestor was so successful - surviving is a fierce competition and nature is unforgiving.
Any brand new kind of life form that arises (say for instance, silicon based life) is going to have to compete with all the forms of life currently in existence (carbon based life). That brand new life form would still be small and weak and ill adapted compared to existing life forms. So it won't stand much of a chance to grow and evolve.
(Response before finishing the video, where this is covered.)
If life arose from chemistry more than once, we wouldn’t know. It’s possible more than one single celled lifeform arose and both survived but evolved along similar lines. We see convergent evolution in various only distantly-related species here on Earth.
I, for one, think panspermia is a somewhat likely source of life on earth. Single-celled organisms could have been seeded by collisions of cosmic bodies or by an ancient intelligent race contaminating the galaxy but leaving no other traces we can see on or from Earth.
A lot more in-depth reading is needed.
Critical thinking is a lost cause in society.
Most will do a 5 day deep dive and post crap like that.
These are the people that are in for ontological shock
Ignorance is bliss though
@@RichUniverse_dude, chill out
99% of all species that have ever existed are now extinct! Apparently😊
wonderful voice and video.. The channel name is charming too. I thought you had much much more views and subscribers, it's of a very high quality!
Thank you! I often get asked why I don't have more subs, but if I knew the answer, I would probably have more subs :D
@@bluedotdweller I think it’s just a matter of time, I love finding new women who speak about such subjects and science in general! Have a great day
Trying to figure out her accent. Sounds like New York mixed with something Eastern European or Russian.
@Lyra0966… why on earth do you say New York? Although I’m making an assumption as well, being Scottish and on this side of the world, absolutely *zero* says to me this lady isn’t European. As in speaking English from a European country… are you American? Why do all Americans seem to think accents have to have a mix of US filter in them lol..
@@jayboy2kay7 No, I'm Welsh but live in England. Some years ago I lived for 4 years in the US, married to a Californian. Been to New York multiple times. And partly because of that I watch and listen to mostly US political and environmental channels. The female speaker's voice here, for some reason sounded like it had a NY twang. But, I wasn't certain so I asked the question. There was no ethnic nor cultural bias in that question.
It is terrifying to think how rare Earth might be.
It is not an atmosphere absorbing radiation (your comment on Mars at 13:00) that is critical, rather it is a MAGNETOSPHERE. The Earth's magnetosphere blocks charged particles, cosmic rays, and solar winds that would otherwise strip a planet of its atmosphere. Venus is an exception because its atmosphere is 100 times denser than Earth's and CO2 itself is heavier than oxygen and nitrogen and it is 97% of Venus' atmosphere compared to a mere 0.04% of Earth's, although global warming propagandists have many assuming it is much more. Venus is also still intensely geologically active. Venus' atmosphere may survive it not having a magnetosphere but the planet is bombarded by cosmic rays. Because the Earth's magnetosphere reaches to the moon, the Apollo astronauts were shielded from these charged particles although solar winds will "kick" the magnetosphere from around the moon from time to time, only 12 humans have ever been there and only for 24 hours. It is widely assumed by many that these threats make human space travel beyond the Earth's magnetic field a deal breaker. These charged particles can knock out your brain cells and you wouldn't even know it, astronauts would just go retarded.
OTOH, a magnetic field can also KILL LIFE if its large enough. Jupiter's magnetic field is so powerful, it is the largest object in the solar system and it creates a highway for charged particles and all probes venturing to the gas giant have to be hardened against this radiation and sent on polar orbits that duck away from the donut-shaped magnetic field. Spacecraft electronics are almost as susceptible to radiation as human biology. Any human standing on Europa would die of radiation exposure within hours thanks to Jupiter's deadly belts. You can actually feel these charged particles, one of the survivors of the Chernobyl disaster said it was like pins and needles on his tongue and face.
As for intelligent life, watch Suzano Herculano-Houzel's TED Talk "What is so special about the human brain." The key is not the size of a brain but how many neurons it has and the key to humans for this was learning to cook food, as opposed to non-intelligent animals that must constantly forage and spend massive amounts of energy breaking down food. Our brains have gotten so big, they consume 25% of our caloric intake. Things we eat are literally our brain food:
ruclips.net/video/_7_XH1CBzGw/видео.html
To develop this ability to cook (or "pre-digest food by fire") requires a land-based form of life with appendages that can manipulate well. Life may seem "complex" but its not really, it's simply four molecules adenine, cytosine, guanine, and thymine functioning as self-replicating nanotechnology. Over time the arrangments of those four molecules may make complex things, but the recipe is still pretty basic, just as 26 letters make up all the things ever written in English.
Great alternative or addition to Sabine Hoffenfelder's channel. Really enjoyable.
The amount of work you put into this one was well worth it. Thanks for taking your time and doing it right. Mathematically, we had to be born and evolve at the right time in the universe in a bell (gaussian) curves and this applies to all races. The only question is one you know well. Where is everyone and yeah, what do they look like!
Thank you.
I wonder if the asteroid that killed the dinosaurs scattered life around space.
Like a reverse panspermia
Who is to say life on earth didn't come from somewhere else... or was planted here because it's a pretty good place to start it on. I think it really boils down to intelligent life because there is no doubt that there are other lifeforms in other systems. We're here after all and you're telling me throughout the age of the universe *this* is the only place that has life and we humans are destroying it(and possibly ourselves)? That sounds ridiculous. Even if we wipe out the life on this planet is it''s doomed anyway so I'm certain there are other "aliens" out there and I'd be shocked if some of them aren't smarter than us. Who knows what's on the other side of the galaxy and let alone *other* galaxies. In the end once we really start going deep into creating artificial intelligence it's only a matter of time until we're creating ourselves as machines. Unlike us those machines will last a very long time so they could colonize other systems if they wanted to.
Close! algae is pronounced with a 'J' sound... like "al-J"
Nothing makes me happier than to see you again and again! Carry on, please, my anticipation grows with every deep-dive you take... ❤️
Keep up the great work!
Lmao. Algae is correctly pronounced with a g sound in british english
Good video. Thanks for pointing out that, since we don’t know how life arose, we really can’t yet assert what the likelihood of life on other planets might be.
One other thing. Years back, I can remember some astronomers saying that Earth is almost too far from the sun to be in the Goldilocks Zone. That if it weren’t for our atmosphere, the Earth would be too cold. But I haven’t heard that idea bandied about in quite a while. Do you know if our understanding of that has changed?
From what I can gather, it depends on how conservative you are with what you can consider the habitable zone of a star. From what we can observe in the Solar System, Earth is very much in it, but it is true that the atmosphere traps a lot of warmth, and without it our planet would indeed be quite a bit colder. But no (or a very thin) atmosphere would pose bigger problems for life on Earth. A thicker atmosphere might not be crucial for life - it can hide underground for instance, but it helps with things like keeping liquid water on the surface and shielding from the Sun's ultraviolet rays.
Mars is at the very edge of our Sun's habitable zone, but our neighbor is also quite small, only half the diameter of Earth, and it seems Mars's inner core has stopped spinning billions of years ago, so it has no significant magnetic field either, and so the Sun's radiation has free reign. This has stripped Mars of much of its atmosphere and what liquid water used to be on the surface evaporated into space. It's overall not a pleasant place to live.
Venus is just outside of the habitable zone, even if we're being optimistic about it.
Another great upload. Praise Charles Darwin that elephants did not evolve wings!
If we are talking about intelligent aliens that can create technology and build civilizations, then imho they would most likely be human-like. Just like in the example about flying where different species must evolve similar structures in order to conquer universal physical laws that apply to all flying species (gravity, lift, air resistance etc) so would other intelligent species have to evolve certain common traits. For example, a dolphin-like creature may be more intelligent than humans, but you cannot operate machinery, move levers, buttons and switches, pick up a tool, or build and fly a spaceship with fins. Or feathers. Or even paws. You need limbs and fingers for that. 100% of all animal life on earth needs to take in and process energy, i.e. food, so they must have something like mouth and digestive system. And so on. So, I'm ok with imagining aliens like ET or Paul or Alf, just keep the cats away from him 😂
The funny thing with dolphins is, they are mammals that evolved to be very efficient swimmers - but their fins still have finger bones. They're just kind of useless because the dolphin's limbs are now built for swimming, but they evolved from mammals that lived on land.
Evolution can't "invent" entirely new things, it always builds upon what already existed before. Suppose there's a world with dolphin like creatures - they are already descendants of animals that lived on land, and had leg and paws, but now the need to become more intelligent and use tools in more refined ways arises. Do you think these dolphin like beings could evolve limbs that suit their need to be efficient swimmers AND use tools well? The possibility surely is there, since their limbs have the basics for both.
The distant ancestors of humans were once beings that had paws - so hands evolved from that. The possibility surely exists.
Your assumptions are correct only if you leave out panspermia. If life in the universe is the result of it spreading from one or more original locations then we can expect similarities in the species that evolve on each planet, and probably all of them evolve mammals which could eventually evolve into primates and then into humanoids. And if there isn't such a repetitive sequence then it could be manipulated to do so by preceeding humanoid species from nearby planets who want similar humanoids to be in charge of the planets. So in effect, almost all the very intelligent species could be humanoid, and we are all linked to each other genetically.
All life came from Non life
🫀🛸🫀
too speculative
What were you expecting, Grey Anatomy?
well what else were you expecting? Her going into space and meeting english speaking aliens?
Not very rationalized argumentation. Evolution will never over engineer a life form. Therefore there will always be a limit to intelligent life forms in the ocean. Highly intelligent life will in many aspects be like humans. It has to be able to control fire, build things by handling tools, have vision, hearing, language, writing etc.
we know of highly intelligent animals that are very different from us. Alien planets could be vastly different, and their highly intelligent beings have to be too. It also could be incomprehensible to us, not based on the same chemicals as we are. Fun to think about.
I love your videos! Just subbed 🫰
Yet. Aliens could resemble any of Earths life forms ?
Theres no way all of the staggering complexity of the earliest forms of life was 'just an accident'. It had to have been delivered from somewhere or by someone. Once unleashed on this delicious planet, life seeped into every part of Earth's oceans, surface, interior, and even its atmosphere.