Why Scientists Are Injuring Digital Humans to Improve Your Life

The human body is complex. It’s got 206 bones, over 600 muscles, and
every day I get older, I discover a new joint I didn’t know could hurt so bad. Learning to control the darn thing takes years
of practice and refinement, and some of us still don’t quite have the hang of it. But artificial intelligence is getting better
all the time, and using consumer-grade computer hardware, scientists in South Korea were able
to train a neural network to control a simulated human body. The work could shape the future of physical
therapy, surgery, and robotics. They started by building a simplified human
body. The researchers figured they didn’t need
all of those 600 plus muscles, so they did away with the superfluous ones that control
things like facial expressions and kept just the 346 that contribute to how joints move. They rigged these muscles over a skeletal
tree that had eight revolute joints like knees and elbows and 14 ball-and-socket joints like
hips and shoulders. To save on the computational load, they also gave him simplified feet with two blocky toes and 31 fewer muscles to simulate. Then they started training him, teaching an
algorithm to control their skeleton through a variety of tasks, some as simple as walking,
while others were more complex, like cartwheeling or lifting weights. Now, this is about the time alarm bells started
going off in my head. They’re training AI to control a buff emotionless
skeleton that lifts weights. I can practically hear that thing saying,
“I’ll be back”. Even more impressive, or worrying depending
on how many times you’ve watched the Terminator movies, is how fast the AI learned to coordinate
these muscles. Researchers started by feeding it motion capture
data of humans doing the desired task like walking. Researchers have taught AI to make a biped
model walk without a reference point in the past, but the results weren’t always…
humanlike. Anyway, it’s faster to train the AI with
these references. Now, depending on how complicated the action was,
the AI could learn to mimic it in anywhere from 12 to 36 hours. And this wasn’t some supercomputer that
was crunching the numbers either, but a PC using a higher-end CPU and graphics card from
2017. Once the AI had the movement down, researchers
could start changing the parameters to see how it responded. They made the weights it was lifting heavier,
and watched as their model started using different muscle groups. They told it to jump higher, and their guy
responded by using their arms in more dynamic ways to balance. They pelted it with simulated balls and watched
him shake them off until toppling over, looking like me in high school gym class on dodgeball day. Or in my adult dodgeball league right now. Go fighting Unicorns. Anyway, whatever the researchers could literally
throw at it, the AI adapted. Finally, they started tweaking the skeleton
and muscles to simulate various ailments, like tightened calf muscles that made the
character walk on its tip toes, or a prosthetic limb that made the character learn a whole
new gait. They also simulated surgeries to correct for
those ailments, and watched how their model adapted post operation. This is where the value of research like this
is really apparent. Building a bipedal model controlled by AI
can teach us how people will walk with a new prosthetic limb design, or can help inform
doctors what surgeries will do their patients the most good. And someday, if the AI is robust enough and
robotics are advanced enough, it can make a bipedal robot blend in among humans. I just hope it also learns to forgive us for
when we simulated injuring it… I’m not as worried about AI in the future
as I am worried about human hackers right now. I used to assume my info was safe online until
someone used my debit card to buy a couple Call of Duty games. If you want to take your online security seriously,
the best way is by using a VPN, and I’ve been using one since Black Ops III. NordVPN has military-grade encryption and
unlimited bandwidth. And that’s not the best part. They have a crazy good deal where you’ll
get 75% off a 3-year plan at nordvpn.com/SEEKER. That’s about $2.99 per month, and for a
short time, use code SEEKER to get an extra month of NordVPN for free! The human body is complex and there are lots
of ways it can all go wrong, like your bones turning hollow. For more on that, check out Sick’s video
on osteoporosis here. Do you see a benefits to teaching machines
to walk or are you worried about a T-800 situation? Let us know in the comments, make sure to subscribe while you’re down there, and I’ll see you next time on Seeker.


  1. I've been thinking about this exact application since I started watching anime!! We can make such better fight choreography in anime now!!

  2. Same nerd who are engineering this probably think its funny that the simpsons predicated trump…….have they not seen terminator…..the matrix.. wtf man

  3. You're in an adult dodge-ball league? Julian, no offense, but I'm pretty sure that's the nerdiest thing that I've ever heard.

  4. 'Learning to control the darn thing takes years of practice and refinement, and some of us still don't quite have the hang of it'.

    This is very true, I observe many people who are sloppy with their movements.. Perhaps I'm being judgmental, but shouldn't practice using our bodies be priority? The excuse for not being athletically talented is your own choices/priorities.

  5. When I was in the army we used McAfee and got hacked into all the time. "Military grade" isn't some actual level of technical superiority.

  6. 2:40 Unicorns are for girls you fu*king tard, their horn represents a penis are you fu*king gay or just plain stupid?

  7. Dude! Your not old, stuff shouldnt be hurting that bad yet, i beat the crap out of my body and it didnt give out till 40 but then it all gave out. You should see a doc to make sure something else isnt going on that you may be able to catch and fix or thwart early. Dont wait like i did, hell sucks bud, treat the body as the temple…wise words. Good luck and best wishes fellow human science lover. ✌

  8. All cliche Skynet jokes aside, this will be super awesome for prosthesis mobility in the near future. Limbs or even other muscular structures being controlled by interface with the brain or even in conjunction with it. The newer body mods that future generations will vie for, to stay relevant in an ever increasing robotized workforce. Things are only going to get more rad from here on out.

  9. Wouldn't this be great if you could upload a body ct and mri scan, add some variables and goals and let ai figure a bespoke treatment for individual cases..

  10. I am a Cyberdyne model T-800 neuralink computer. "I'll be back" Be sure to check out ERB Terminator VS Robocop

  11. Mixed feelings about AI, there are bad and good people, guess same could be applied to AI, guess we have to teach it some basic feeling and instincts like some animals and put them up with other AI similar or less/more advanced AI and see how they interact.

  12. • 0:54 – Who says that'll even work, that it'll be able to walk properly with two big, blocky toes? We evolved our feet the way they are because it made it easier to walk; if having two big, blocky toes would work, we'd have evolved that instead. 🤦
    • 1:12 – Maybe the robots know that our curiosity makes us incapable of resisting stuff like this and Skynet is inevitable. 🤔
    • 1:40 – Code Bullet and Code Parade have made simulations that "walked" exactly like that, and while you might think that's a failure because it doesn't look like real evolution, it actually is exactly like evolution in real life; just picture microbes and such randomly flailing around with their flagella. Same thing, and yet some eventually evolved into more complex life which eventually evolved into bipedal monsters that destroyed the world. Oops, sorry, spoiler alert.
    • 2:49 – I don't know how I feel about this. On the one hand, it's not real, on the other hand, this still seems cruel. 😐
    • 2:58 – They modeled a fop? 🤨 They forgot to give him a hat and walking cane.

  13. ultimately, computers are doing what humans are telling them to do. so, if a computer goes haywire or goes rogue, we will usually have someone to blame it on. and when in in doubt, we can just blame Bill Gates or Elon Musk.

  14. Hi, thanks for watching! Want more on the relationship between AI and humans? Check out this video about Elon Musk's Neuralink: https://youtu.be/VIWaIJllptc

  15. Nice! Through the Architecture of Nature you can discover truth and find purpose in Life. https://youtu.be/45TTPkbjk84

  16. Despite all the breakthrough technologies involved, still walks like it has a stick up its ass.

  17. Better on robots than on live humans and animals! I believe robots are far yet from being sentient so I think we are in the clear!

  18. 2019:Why scientists are injuring digital humans to improve your life
    2091:Why digital humans are injuring scientists to improve their life

  19. to be fair unless we make consequences for the Ai, an injury is not a bad thing. You know a broken leg is bad because it hurts and you cant move around with it, also it could end your life if its bad enough. None of those things apply to Ai. It has the same consequences as you imagining yourself with a broken leg, without ever haven broken one.

  20. The need for animals in medical experiments won't be completely replaced by AI simulations anytime soon but this could be a start in that direction, right?

  21. AI and robotics are very likely going to go terribly wrong, but no one seems to care that much. Not surprising considering how the whole climate change thing is going. Oh well I guess we'll get what we deserve.

  22. this guy is willing to put himself out there for the world to see, but is too shy to do half decent arnold impersonation

  23. They could create a ai based off of the new learning programs, give it somewhat of 3 to 4 of the human sinces, and make it confined to the ai robotic body. Besides humans are biological ai confined to a biological robot body with 5 sinces.

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