5 Times Evolution Should Have Planned Ahead

2 533 Shikime 257 mijë

Natural selection can lead to some pretty amazing adaptations, but sometimes the resulting traits aren’t the most efficient solutions to the problems at hand. With the bar set to “good enough,” here are some features that arose from evolution which get the job done in strange or roundabout ways.
Hosted by: Rose Bear Don't Walk
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Sources:
Photosynthesis
doi.org/10.2210/rcsb_pdb/mom_2000_11
doi.org/10.1199/tab.0130
doi.org/10.1042/bss0610001
doi.org/10.1098/rstb.2005.1737
www.khanacademy.org/science/biology/photosynthesis-in-plants/photorespiration--c3-c4-cam-plants/a/c3-c4-and-cam-plants-agriculture
doi.org/10.1093/jxb/ern081
doi.org/10.1093/jexbot/53.369.569
doi.org/10.1111/j.1469-8137.2004.00974.x
doi.org/10.1016/j.cub.2013.04.066
doi.org/10.1093/jxb/erw156
Marsupials
www.academia.edu/download/45849422/The_marsupial_pouch_implications_for_rep20160522-22723-1vg6ypc.pdf
books.google.com/books?hl=en&lr=&id=zunYrumtsR8C&oi=fnd&pg=PA213&dq=marsupial+sex+organs&ots=3DsCMRupXv&sig=ReCoxZM96w1nMLWaNIgI_tozEes#v=onepage&q=marsupial%20sex%20organs&f=false
doi.org/10.1111/j.1558-5646.2009.00690.x
www.researchgate.net/publication/228671434_To_replace_or_not_to_replace_The_significance_of_reduced_functional_tooth_replacement_in_marsupial_and_placental_mammals
The RLN
www.science.org.au/curious/earth-environment/why-evolution-isnt-perfect
www.ncbi.nlm.nih.gov/books/NBK560832/
www.ncbi.nlm.nih.gov/books/NBK470179/
doi.org/10.4202/app.2011.0019
arxiv.org/pdf/1901.01560.pdf
Eyes
evolution.berkeley.edu/evolibrary/article/side_0_0/eyeworks_01
www.pbs.org/wgbh/evolution/change/grand/page06.html
dx.doi.org/10.1038%2Fnrn2283
doi.org/10.1007/s12052-008-0091-2
doi.org/10.1038/eye.2017.226

Bipedalism
www.sciencemag.org/news/2013/02/human-evolution-gain-came-pain
doi.org/10.3390/biomimetics4030060
doi.org/10.1038/46965
journals.co.za/doi/10.10520/AJA00382353_7777
doi.org/10.1002/ajpa.10058
jaoa.org/aoa/content_public/journal/jaoa/938176/622.pdf
Image Sources:
www.istockphoto.com/photo/human-evolution-concept-gm534666343-57025144
www.istockphoto.com/photo/small-plant-growing-in-garden-with-sunlight-gm1098175106-294925383
www.istockphoto.com/photo/close-up-of-agave-succulent-plants-selective-focus-toning-gm644186460-116811255
www.istockphoto.com/photo/ripe-sorghum-milo-millet-crop-field-in-rows-gm503285337-44539474
www.istockphoto.com/photo/a-mother-opossum-with-its-four-babies-on-the-pavement-gm145992459-6021241
www.istockphoto.com/photo/kangaroo-and-joey-gm183412961-15481964
www.istockphoto.com/photo/koala-with-joey-gm1043281514-279279126
www.istockphoto.com/photo/pretty-faced-wallaby-gm1187266245-335312813
www.istockphoto.com/photo/western-grey-kangaroos-hopping-in-the-pinnacles-desert-near-cervantes-in-western-gm1280454033-378751604
commons.wikimedia.org/wiki/File:Recurrent_laryngeal_nerve.svg
commons.wikimedia.org/wiki/File:GiraffaRecurrEn.svg
www.istockphoto.com/photo/morula-early-stage-embryo-gm1199299494-343074205
commons.wikimedia.org/wiki/File:Guiyu_BW.jpg
www.istockphoto.com/photo/human-dark-brown-eyes-close-up-side-look-gm1207350570-348567451
en.wikipedia.org/wiki/File:Evolution_eye.svg
www.istockphoto.com/photo/common-octopus-gm894399752-247279301
www.istockphoto.com/photo/pharaoh-cuttlefish-sepia-pharaonis-his-right-eye-north-sulawesi-indonesia-gm97881808-12318152
www.eurekalert.org/multimedia/pub/196779.php
commons.wikimedia.org/wiki/File:Diagram_of_eye_evolution.svg
www.istockphoto.com/photo/running-on-tracks-gm616002088-107046357
commons.wikimedia.org/wiki/File:Stegosaurus_Senckenberg_white_background.jpg
www.istockphoto.com/photo/3d-illustration-of-human-body-spinal-bone-anatomy-gm952777260-260108613

Komente

  1. Andrew Austin
    Andrew Austin
    17 orë më parë

    Well actually it’s not random Mutation you can ask any person specifically in the study of that field and say hey in your 100% opinion can you tell me that it’s random mutation they’re going to tell you that is a terrible way to look at it and not giving nature enough credit

  2. Robert T
    Robert T
    22 orë më parë

    Do people actually view the ape leading to man picture as a roadmap or forward looking? I always thought that the picture was supposed to be a look backwards showing the end result that didn't start off that way and it was a process to get there.

  3. David Graham
    David Graham
    2 ditë më parë

    The kindhearted save promisingly thank because vault lately flow circa a uncovered cover. gray greasy great, endurable bracket

  4. HardhatRussian
    HardhatRussian
    2 ditë më parë

    Sorry, i've been watching scishow religiously for years, and today is the day i break my silence.... can you please have your casters have their own voice instead of trying to recreate Hank's speech pattern for info delivery?? Its painful and forced, I am really not trying to be mean or even start anything, just a serious suggestion to continue forward

  5. Stephen Edwards
    Stephen Edwards
    2 ditë më parë

    Great video. Well done, Rose Bear

  6. CoffeePee
    CoffeePee
    3 ditë më parë

    I wouldn't trust an artificially created robot about human evolution.

  7. Krabbypattyvag
    Krabbypattyvag
    3 ditë më parë

    You look like your favorite snack is top soil

  8. FunkYeah
    FunkYeah
    3 ditë më parë

    The start of vertical bipedalism most likely was assisted by the support of water as proto-humans waded through swamps and seashores. Even today, aquatic-therapy helps with back pain.

  9. Just a Man
    Just a Man
    3 ditë më parë

    Like the use of the analogy of seeing what sticks to the wall, but like a joke if ya gotta explain it then it loses its lustre

  10. Red
    Red
    3 ditë më parë

    Trial and error, basiclly.

  11. DayBeat Garcia
    DayBeat Garcia
    4 ditë më parë

    Modern humans criticizing the "efficiency" of evolution is the equivalent of Gordon Ramsay judging first humans for throwing whatever meat they hunted/found into fire and expecting it to be perfectly cooked and tasty.

  12. Omole Akinyemi
    Omole Akinyemi
    4 ditë më parë

    Connected my phone to office wifi and Bluetooth speakers. And they all went full NERD ALERT!! on me

  13. Junho Lee
    Junho Lee
    4 ditë më parë

    This is Software development at its finest

  14. TEJASH DHONGADE XD
    TEJASH DHONGADE XD
    4 ditë më parë

    C3,C4 and CAM IS ALL I studied when I was 14 I remembered it now

  15. Emily Janet
    Emily Janet
    4 ditë më parë

    I got way too excited when I saw the University of Guelph credit

  16. Salad Salad
    Salad Salad
    4 ditë më parë

    C- Can I pinch her cheeks? (I'm on 4 hours of sleep with 17 hours of being awake please dont send me to horne jail)

  17. Rosetta Foster
    Rosetta Foster
    4 ditë më parë

    Another example I know of: The fact that our respiratory and digestive systems use the same openings. There isn't really an evolutionary advantage for choking on our food; it's merely a side effect of evolution making things up as it goes.

  18. Borden Fleetwood
    Borden Fleetwood
    5 ditë më parë

    The only thing I'll say is that culture has also played a huge part in human back pain and joint degradation. The current "conventional" podiatric locomotion cycle is optimized for a heel-strike with follow through. This is more comfortable when wearing riding boots or shoes with a 2cm or greater heel lift. What it doesn't do, however, is allow the structures further forward in the foot, which are optimized for shock absorption, to actually come into play during the heaviest and hardest compression points in the cycle. Compare that with other civilizations and cultures that either don't wear shoes, or wear an absolute minimum of foot protection - often a flat plank of malleable leather or woven fiber, with no heel lift or arch support. Except in the cases of actual foot malformation or degeneration, those cultures see generally less lumbar, knee and ankle degradation in comparison to "western" societies. (Those societies have *other* issues that lead to shortened lifespans, juvenile mortality and such, but their elderly are often quite spry.) Some of the developing shoe technologies are currently exploring this phenomenon, and the results are currently quite promising.

  19. Random Vibes
    Random Vibes
    5 ditë më parë

    According to Entropy; even if you have billions of years, things will get more disordered over time. (at least on their own)

  20. Joel Feila
    Joel Feila
    5 ditë më parë

    well the spine thing is also partly people not walking standing correctly and the hard work we do

  21. K L
    K L
    5 ditë më parë

    "Ladies and Gentlemen, It'll be 1 inch smaller in 100 years." . . . ladies: "FML"

  22. Bouzsi
    Bouzsi
    5 ditë më parë

    I thought wallbanging was when you put her up ag.... actually, nvm.

  23. Liam Becker
    Liam Becker
    6 ditë më parë

    9:15 Rose is secretly a squid kid

  24. Christian Noll
    Christian Noll
    6 ditë më parë

    I believe these are called arguments for poor design, if you are interested in the general topic

  25. Jimmy M
    Jimmy M
    6 ditë më parë

    I heard wall banging as while banging. It works both ways, those that bang the most, succeed.

  26. takumi168
    takumi168
    6 ditë më parë

    I like the analogy throwing it against the wall and hopping it sticks.

  27. Brian JOnker
    Brian JOnker
    6 ditë më parë

    C3 works well at cooler temps than C4 does.

  28. Stanley Jobson
    Stanley Jobson
    6 ditë më parë

    Evolution is a theory and a poor one at that.

  29. Robert Holthouse
    Robert Holthouse
    7 ditë më parë

    Photosynthesis is so very cool and strange and confuesing

  30. Emma Kinzian
    Emma Kinzian
    7 ditë më parë

    Could have sworn you said "the ones that survive WHILE banging..."

  31. Christy McKee
    Christy McKee
    7 ditë më parë

    If we came from apes, long ling long ago and we didnt. But if we did there would be no apes now...

  32. 2nd North
    2nd North
    7 ditë më parë

    That's why its BS

  33. Augie Vasquez
    Augie Vasquez
    7 ditë më parë

    Pardon me Rose bear don't walk, I remember when your first video came out. I was one of the first people to watch it. I've seen everyone of your video and you are by far my favorite female scientists. I've always enjoyed watching me eons. I like homegirl's ink. But you are an atypical nerd like myself. In fact you remind me of my daughter, she's atending college right now she's going to graduate high school with a degree. When she first started this program she told me she wanted to be an astronomical scientist. She's 17 and knows it all, I can't tell her anything. She has since changed her studies towards nursing and the Medical field. I really like listening to you. It's people like you who's light shines so bright that others feel the warmth of your energy. Keep shining bright. You are a joy to watch.

  34. James Lucas
    James Lucas
    7 ditë më parë

    I once read somewhere that nature doesn't go for the best solution, but tries any solution.

  35. ckl
    ckl
    7 ditë më parë

    Two things. Firstly, if a species of cephalopod species evolved to live longer than a few years, they'd likely become the dominant species of this planet. Secondly, when "designing" an alien species for fiction, don't design it, use traits selected by dice roll and screened with environmental challenges.

  36. Clockwork Kirlia
    Clockwork Kirlia
    7 ditë më parë

    Not efficient in a lot of ways, true, but there are some *extremely* hyper-optimised traits out there. Insects are *terrifyingly* efficient movers and shakers, compared to anything we can seem to build, but then again you've also done a video on how we're trying to exploit that in our engineering.

  37. Einstein WasRight
    Einstein WasRight
    7 ditë më parë

    Molecular cell biology books teach that RubisCO mistakenly fixes an Oxygen atom instead of a Carbon atom about once in 20 cycles, but I presume that that was measured in vitro. In water, living cyanobacteria (in whom C3 photosynthesis first evolved) and algae should have higher efficiency because Oxygen dissolves very poorly in water whereas Carbon Dioxide dissolves readily, and CO2 easily diffuses through cell walls and cell membranes. Even on land the environment inside chloroplasts where C3 photosynthesis occurs is an aqueous one, although when the plant is dry on hot days one would expect the RubisCO efficiency to decline. If genetically modified crop plants become more socially acceptable then an increasing variety of species can be expected to get modified to become C4 synthesizers, which should increase agricultural productivity.

  38. Leonora Dompor
    Leonora Dompor
    8 ditë më parë

    Taking Covid vaccines can still contaminate Covid Virus to other people and still have cycles of lockdown, so eat more green vegetables and more green leafy fresh juicing, I am the Virgin Mary the Mother of God the Best Female Doctor ! I am no no no to Covid Vaccines !

  39. BFDT
    BFDT
    8 ditë më parë

    SciShow - this is important: Oftentimes y'all and other scientists use the outdated adverbial phrase "in order to" or simply "to" when describing what evolution or what species do to arrive at a form that continues to ensure sufficient reproductive strength to go to the next generations. I catch all of you saying that or using a similar phrase that implies some kind of forethought or planning for that survival, which we all know is wrong. Review your scripts for these kinds of outdated descriptions, for they do give the contrary impression that y'all are trying to give to the general viewer.

  40. Like Bot
    Like Bot
    8 ditë më parë

    Or: "5 Times Evolution Should Have Planned A Head"

  41. Federico Jimbo Smithson
    Federico Jimbo Smithson
    8 ditë më parë

    1. Bipedalism instead of a wheel

  42. Gavin Libby
    Gavin Libby
    8 ditë më parë

    I'm still not sold on C3 photosynthesis not being optimal... 80 some percent is alot to not be the most efficient... Survival of the fittest is pretty steady. Im wondering what other restraints and prerequisites come with other types of Photosynthesis

  43. Aoife Hilton
    Aoife Hilton
    8 ditë më parë

    I have no. 5 to blame for the scoliosis slowly crushing my lungs - thanks evolution

  44. FGIALC Gorge
    FGIALC Gorge
    8 ditë më parë

    Whoa, I'm in love. Great video. I want Cephalopod eyes.

  45. Mass Debator
    Mass Debator
    8 ditë më parë

    Number 6: Digestion and reproduction. The fun pipe is also the waste pipe. The best place is inches from the crap place.

  46. Eddie Junior
    Eddie Junior
    8 ditë më parë

    This video was amazing!

  47. Lars Larsen
    Lars Larsen
    8 ditë më parë

    I'm very glad evolution doesn't try to be efficient. If evolution tried to be more efficient that would be horrible and concentrate all life right on top of false peaks of efficiency from which there is no escape.. instead of spreading life nice and randomly everywhere that isn't too deep into a valley to survive, so that its possible for some life to find shelter near another peak when the closest peak turns out to have been a volcano all along!

  48. Rike S
    Rike S
    8 ditë më parë

    Evolution can't plan ahead only adapt to the environment. Brains on the other hand can plan. Wolf packs devise plans of attack on elks.

  49. Dard 151
    Dard 151
    8 ditë më parë

    It's not survival of the fittest, it's survival of whatever works.

  50. sitara kistiah
    sitara kistiah
    9 ditë më parë

    Can I ask a question How did Mali become the richest country to the poorest country

  51. Anna Dalèn
    Anna Dalèn
    9 ditë më parë

    Kangaroos really said Prochoice lmaooooo

  52. Robert Shipley
    Robert Shipley
    9 ditë më parë

    A females brain

  53. Gabrielle Giner
    Gabrielle Giner
    9 ditë më parë

    Who's the new host?

  54. masu485
    masu485
    9 ditë më parë

    I can't believe there so many out here who still believe in Creationism

  55. Elouj Time Reaver
    Elouj Time Reaver
    9 ditë më parë

    Yo, can I make the RLN more efficient through surgery?

  56. janegael
    janegael
    10 ditë më parë

    Rose Bear Don't Walk, you win the internet for having the best name ever! You're also an awesome presenter. :-)

  57. Parker Ripley
    Parker Ripley
    10 ditë më parë

    I'm like 12 years old and after she said, "wall banging" I was unable to concentrate on anything else. Rose Bear is so gorgeous. Ok... I'll leave.

  58. Crunchy Bones
    Crunchy Bones
    10 ditë më parë

    Reject bipedalism. Return to monke.

  59. Anders Öhlund
    Anders Öhlund
    10 ditë më parë

    Inefficient designs stay around because just because for example even when one group of plants develop a more efficient form of photosynthesis that can't be back-ported to other plants. They need to either completely out-compete them and replace them or they have to separately evolve a similar solution. Sexual reproduction makes the transfer of a new trait possible among a specific species which is a lot more efficient than purely linear evolution but it is still very limited when looking at life as a whole.

  60. Bealzbob
    Bealzbob
    10 ditë më parë

    The RLN route is so we can speak from the heart.

  61. Ian Howick
    Ian Howick
    10 ditë më parë

    "The ones that survive wall banging" ...Goodnight, everybody!

  62. Zairah Enterina
    Zairah Enterina
    10 ditë më parë

    *"Write that down!"*

  63. 7lllll
    7lllll
    10 ditë më parë

    we should have kept 6 limbs, or even better 8. 4 for running, 2 to grab stuff, and 2 to fly, or at least glide

  64. Matter of Fact
    Matter of Fact
    10 ditë më parë

    Evolution has zero ability to plan anything. If it did we wouldn't have the main driving force which are mutations damaging healthy genes and causing all genetic diseases of every type of living organism on the planet. And "No" , many layman didn't know that most evolutionary charts are completely misrepresented thru both fossil evidence , dating or sequences for the sole purpose of creating assumptions.

  65. Just the truth People
    Just the truth People
    10 ditë më parë

    What a load of rubbish

  66. nixon2tube
    nixon2tube
    10 ditë më parë

    The marsupial reason for surviving might have to do with that 3 levels of gestation / young raising can happen simultaniously: The embryo in the uterus, the joey in the pouch, and the still feeding at the teat youth jumping around with mother.

  67. Roger Stone
    Roger Stone
    11 ditë më parë

    We all come across that Laryngeal Recurrent Nerve thing when wiring up a new computer. Plug this into that, connect that with that, and I want the speakers over HERE... It's just Evolution has no way to unplug the lead and thread it back through, it can only make the cable longer.

  68. Luca Tinunin
    Luca Tinunin
    11 ditë më parë

    and this why evolution is way more interesting than intelligent design. The fact that such awesome diversity is created by such a dumb process is really wonderful

  69. Quinn Ethan
    Quinn Ethan
    11 ditë më parë

    I'm still not totally sure who this person is but I like her. I like the way she talks; makes it a bit easier for me to process the info

  70. Dhruv Solanki
    Dhruv Solanki
    11 ditë më parë

    Nice video as always! I like this host.

  71. fluffysheap
    fluffysheap
    11 ditë më parë

    Humans could have avoided the whole narrow pelvis problem if we were marsupials! Such poor planning.

  72. Nom Anor
    Nom Anor
    11 ditë më parë

    Marsupials evolved as mammals who can perform their own abortions. Sometimes mothers need to terminate pregnancies in resource poor environments (like Australia), better to preserve the life of females to breed again in the future rather than helpless offspring that need food.

    1. Heads Full Of Eyeballs
      Heads Full Of Eyeballs
      10 ditë më parë

      Stress-induced abortions are common among mammals too, though.

  73. Waralo1
    Waralo1
    11 ditë më parë

    You ever heard of Genome Editing? :D

  74. AirLancer
    AirLancer
    11 ditë më parë

    The human body is proof enough of a lack of intelligent design. If there is a designer, then that being is a moron.

  75. Jungle Jargon
    Jungle Jargon
    11 ditë më parë

    Cut the evolution nonsense. It never existed at any time.

    1. jaymz1999
      jaymz1999
      8 ditë më parë

      @Jungle Jargon Of course.

    2. Jungle Jargon
      Jungle Jargon
      8 ditë më parë

      @jaymz1999 Do you see new organisms?

    3. jaymz1999
      jaymz1999
      8 ditë më parë

      Evolution is ongoing. It is observable.

  76. The_Salvadorian_
    The_Salvadorian_
    11 ditë më parë

    0:38 legit thought she said "the ones that survive while banging"

  77. World Theory
    World Theory
    11 ditë më parë

    As nice as it would be to fix evolution's mistakes, it would probably be quicker to create a new design mostly from scratch. Like a robot body. Maybe a biorobot body designed from the ground, up. But a mechanical robot would take a lot less new design work and research to make all the subsystems work.

  78. The Troof
    The Troof
    11 ditë më parë

    Strange that a channel making videos about evolution would suggest by the title that evolution plans ahead. Planning ahead seems like something an intelligent being with agency would do.

    1. The Troof
      The Troof
      10 ditë më parë

      @Heads Full Of Eyeballs the title describes 5 INSTANCES in which evolution SHOULD have, but didnt, plan. The implication is that it could have or had a choice and chose to not plan.

    2. Heads Full Of Eyeballs
      Heads Full Of Eyeballs
      10 ditë më parë

      The title suggests that evolution _doesn't_ plan ahead, though. "Should have" implies "didn't".

    3. The Troof
      The Troof
      10 ditë më parë

      @Tito Lee No, I didnt. THATS HOW I FREE MYSELF FAM.🤔

    4. Tito Lee
      Tito Lee
      11 ditë më parë

      Did you watch the video Lol? The whole video is about how evolution doesn't plan ahead 🤣🤣 free yourself fam

  79. Fay Anne Aura Arts
    Fay Anne Aura Arts
    11 ditë më parë

    "Bipedalism is unique to humans" Birds: "What, am I a joke to you?"

    1. Xueria
      Xueria
      10 ditë më parë

      Here's the full quote: "Bipedalism is pretty unique to humans, at least as far as mammals go." Birds aren't mammals, so their statement stands.

  80. Fay Anne Aura Arts
    Fay Anne Aura Arts
    11 ditë më parë

    Evolution is a blind idiot god. It is the Florida Man of the cosmos.

  81. Guns ArrUs
    Guns ArrUs
    11 ditë më parë

    You should of also covered how the nerves in our hands work which is also really inefficient

  82. Maquez von Hinden
    Maquez von Hinden
    11 ditë më parë

    Evolution is a dangerous religion

    1. jaymz1999
      jaymz1999
      8 ditë më parë

      Evolution is not a religion.

  83. Cynthia n/a
    Cynthia n/a
    11 ditë më parë

    I love that you can finally explain how "evolution has no plan." I like the way you described it. "A bunch of different things exist, the circumstances of life slam them against the wall. The ones that survive wall-banging are the ones that stick." So many people seem to believe that evolution was a strict progression to what we are today; as though all life today was some preconceived design. They then discount the whole process as unnecessarily complicated. They might not be creationists, but their beliefs about evolution is shady. also "Evolution doesn't have a delete button." Yeah, that's what humans are for. (smile)

  84. Einstein WasRight
    Einstein WasRight
    11 ditë më parë

    Cephalopod eyes are a good design if the duration of a lifetime is short. Photoreceptor cells continuously renew their pigmented photoreceptive membranes, shedding the old membranes at the end of the cell. In vertebrates this shedding occurs behind the retina, which builds up pigment there and reduces internal reflections of light. In cephalopods, however, that shedding occurs in front of the retina, into the vitreous humour, leading to the accumulation of old pigment inside the eyeball, which eventually interferes with vision if the creature lives long enough. Also, the retina of vertebrates include "light pipe" cells that help the incoming light slip past the neurons and nerve fibres, so the neural network interference with vision isn't too severe. Yes, cephalopods don't have a "blind spot" where the optic nerve exits from the eyeball, but vertebrate blind spots are offset from central vision, so we are rarely aware of this deficiency.

  85. Jennerick Martina
    Jennerick Martina
    11 ditë më parë

    The 2nd one survival of only the fit one.

  86. ARTexplains Science and History
    ARTexplains Science and History
    11 ditë më parë

    Rose did an excellent job hosting this video

  87. nostalgiachu
    nostalgiachu
    11 ditë më parë

    At the start of the video I was thinking, "Yes! Evolution makes us have FLAWS! See, non-evolution believers-- why would an all-powerful being gives us such flaws?" And then it got to how we evolved from fish... Yeeeah, I think that's where evolution lost them lol

  88. Kata Seiko
    Kata Seiko
    12 ditë më parë

    If you would do some "corrective surgery" on a fetus and loop the aorta under the RLN - what would happen? Would the nerve become that 10cm nerve? How would a human with that changed nerve develop?

  89. Paula Hildebrandt
    Paula Hildebrandt
    12 ditë më parë

    Evolution doesn't plan at all. Evolution is a response to selection pressures. There is no intent in nature, only response.

  90. Andronikos Kapsalis
    Andronikos Kapsalis
    12 ditë më parë

    It is not random! Just see the probabilities!

  91. Terry Stump
    Terry Stump
    12 ditë më parë

    God made us not evolution or the big bang

  92. Graeme Lastname
    Graeme Lastname
    12 ditë më parë

    If the human body was designed then the designer was a sadist. :)

  93. Stolas Amon-Seere
    Stolas Amon-Seere
    12 ditë më parë

    Or five pieces of evidence that creationism isn't real.

  94. Arek Wittbrodt
    Arek Wittbrodt
    12 ditë më parë

    1:05 - is't it description of genetic drift, not natural selection?

  95. Eric Gentzke
    Eric Gentzke
    12 ditë më parë

    I thought she said survive while banging and I was like makes sense lol

  96. Boris Borcic
    Boris Borcic
    12 ditë më parë

    Did the ancestor to the vertebrate brain really emerge before the ancestor to the vertebrate retina? In the contrary case there's an alternate to the scenario narrated in the video : _that_ retina evolved _before_ evolution had it figured out that _brains aren't transparent._ Supporting evidence for that scenario, cube jellies, which prove that vision and eyes don't need a brain to emerge by evolution.

    1. Heads Full Of Eyeballs
      Heads Full Of Eyeballs
      10 ditë më parë

      The brain isn't transparent in the scenario described, though -- the body _around_ the organs is transparent and the light-sensitive tissues are on the top surface of the brain. Some lizards and amphibians still have a photosensitive spot on the top of their head that's connected to the pineal gland and controls the circadian rhythm. It makes a lot of sense that this would be how eyes develop -- the part of the animal's brain that needs to know if the sun is shining to regulate its sleep has a receptor on it that reacts to daylight. That's pretty easy to evolve if your body is transparent, and such an "eye" is useful even if it can only tell light from dark.

  97. Mar Rus
    Mar Rus
    12 ditë më parë

    Shakes fist at spine/general back structure.

    1. Mar Rus
      Mar Rus
      12 ditë më parë

      Also frowns at floppy ankles..

  98. Logan Benner
    Logan Benner
    12 ditë më parë

    words of wisdom

  99. I’m already Sans Undertale
    I’m already Sans Undertale
    12 ditë më parë

    aww

  100. Fidel Coria
    Fidel Coria
    12 ditë më parë

    Wall banging...