How do animals regrow their limbs? And why can't humans do it? - Jessica Whited

[@awesomehpt8938]

I’m sure discovering how to be able to do this with human limbs would cost an arm and a leg.

[@FaizThe-kc6dk]

🤔

[@ethanmartinez808]

**sigh**

[@Thankwikipedia]

Are you proud of yourself

[@SleepyBaseball-fg5op]

Was it worth it?

[@kaleaaa09]

Literally 😂

[@deltax361]

Stem cells. We have it. We used it. Yet lizard gets to regenerate limbs. Truly a skill issue.

[@alphabladelm2011]

I imagine those lizards look at us and think, “Get good, noobs!”

[@Gabriel-fi7nv]

We need to lv up our skill set

[@aguspuig6615]

We couldve probably have it researched by now if we didnt have a wierd scientific obsession with only researching the uncool stuff

[@snicklesnockle7263]

Salamanders are not lizards. They don't have scales, and are not reptiles.

[@Jon717]

If we didn't such strict ethical laws in place restricting scientific pursuit we probably would have figured out how to regenerate limbs by now.

[@oezzimix]

I wish I could regrow the brain tissue I have lost due to social media

[@Phillia_crochet]

Maybe a few neurons here and there but not a chunk of brain. Neuron stem cells exist but we use neuroplasticity more. The first half of the previous sentence is what I was taught at the Stem Cell course back in college. An alternative: using social media to learn by following/ subscribing to educational channels/ profiles instead. I guess you've already did watching Ted Ed. We just need to make it the mainstream for our daily social media use.

[@kissykennysmatt]

😂😂

[@sixthousandblankets]

You still have the neurons, they are just in standby mode because they have been unused for a very loooong time so they are saving energy.😂😂😂

[@olaitonogundimu4431]

😂😂😂😂😂😂

[@l.n.3372]

Axolotls are amazing. I don't know if we'll ever learn how to regrow human limbs, but that would be incredible if we could.

[@markgoggin4776]

I’ll take a regrown tooth 😅

[@nerdlingeeksly5192]

If I were a millionaire, I'd donate my entire fortune to research for this.

[@l.n.3372]

@nerdlingeeksly5192 Honestly same. I'd spend my money trying to cure cancer too

[@000euMJ]

I believe we will (I'll be long dead probably).

[@scooterxiv3778]

Will definetely be possible in 40 years, not on a consumer-level but im sure it will exist. There will be so many new technologies that we now can never even think of needing

[@dragonfury1565]

“How does the limb know how much needs to be regrown, how does it know when to stop growing?” I mean, how does it know how to grow the limb the first time?

[@MP-vc4nu]

Your body limits regeneration to prevent cancer cells growth, Its same as asking why elephants or whales don’t just regenerate their whole limb

[@robertsaget6918]

Our genetic coding in our DNA. We are miles of information turning chemicals into cells into bodies; here to see it but never to understand it. Don't look further.

[@LeoLau-ip9bv]

lol

[@not_Hero]

Dude there is a reason why we have similarities with our parents bruh

[@betterchapter]

If only we could! Would lead to some pretty unusual Guinness World Records however. 'Most Legs Regrown'.

[@FabledGentleman]

You should watch the 2011 national geographic documentary "how to build a beating heart"

[@waleedabdullahkhan5706]

We could maybe but then who would spend money on missiles and nukes

[@battafyuwi6760]

Definitely skill issue

[@delicioushitlist]

Exactly

[@KommanderEd]

Real

[@ethanmartinez808]

We gotta up ourselves.

[@angeloguzman1526]

Exactly

[@papyrusisverycool2372]

lol

[@SaltyLobster]

I see, Spider-man writers got Curt Connors totally wrong. He was researching the wrong animal and should turn into the Salamander, not the Lizard!

[@baonghita3600]

True

[@bharathv5020]

Either way if he messed up .. He Will become The Salamander

[@JesusPlsSaveMe]

​@@baonghita3600 Revelation 3:20 Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me. HEY THERE 🤗 JESUS IS CALLING YOU TODAY. Turn away from your sins, confess, forsake them and live the victorious life. God bless. Revelation 22:12-14 And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be. I am Alpha and Omega, the beginning and the end, the first and the last. Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.

[@PhucThinh1505]

I was just thinking about that movie too

[@diosleftcheek2012]

But lizards do have similar regenerative capabilities

[@mecahhannah]

I hope we figure out how to regrow limbs soon I wish we would invest more in stem cell research especially now that we know it can come from bone As someone with cerebral palsy it would be very helpful

[@Marvelouse]

Well, I mean there's *Some* progression right?. A guy that got his manhood injured, had to attach some sort of meat thing to his arms to regrow a new one and then have surgery to attach it to his crotch.

[@aguspuig6615]

Yep, i honestly feel like there has to be some conspiracy here. Like we have this technology, we know it can come from safe and ethical sources, we know it can do magic to cure all sorts of diseases and even help with cosmetic stuff, and yet we just have the ''research is still ongoing'' thing that yields nothing

[@mecahhannah]

@@Marvelouse I just wish they'd do more and publicize it especially for things like brain injuries paralysis and cerebral palsy

[@ren_ren9370]

That’s the next thing because if ppl that lose limbs experience a phantom limb. Maybe the brain doesn’t even fully register that the limb is gone. So why would it try to regenerate something that is still there

[@overwatchgale4640]

Very cool comment. Maybe it’s a topic of neuroscience combined with the muscular and skeletal and nervous systems

[@not_Hero]

I mean they already said it in the video. There is no point being able to regrow limbs if we (or our cells) don’t know how to notice a missing limb

[@andypanda4756]

My earlobe was cut off by flying glass in a car accident when I was 3 years old. It grew back perfectly.

[@cooldes4593]

If only your earlobe were an arm

[@benten1536]

@@cooldes4593I doubt having a 3rd arm instead of an earlobe would be beneficial

[@cooldes4593]

@@benten1536 youve misread my comment

[@zerospace101]

@@benten1536 Sometimes you need that 3rd hand you know?

[@TheGoldNinja101]

Have you ever had Tinnitus that lasted for years after it grew back?

[@maindepth8830]

Lets be honest, if humans could regenerate limbs it would be a bloodbath.

[@ca-bt6mx]

Why would anyone bath in blood? 🤨

[@SonnyDarvish]

@@ca-bt6mx the blood bathes in us.

[@carterthechevrolet9219]

@@SonnyDarvish How does blood bathe in us?

[@KitasCraft]

is that a geometry dash reference

[@triacontahedron]

@@carterthechevrolet9219 We are (kind of) a liquid, and the blood is in us. Ergo, it's bathing in us.

[@mitsunam7001]

Perfect video for my incoming examination!! 💗

[@גלעדסוירזנסקי]

This channel always knows how to take fascinating subjects and making them accessible and understandable

[@evanrosman9226]

I heard an Octopus can regrow lost tentacles.

[@FaizThe-kc6dk]

I know

[@cryowreck3193]

Infinite takoyaki...

[@minhnguyentien4022]

thats why they are aliens 👽

[@Danestani.master1]

"We are losing this ability more and more every day because we've abandoned living in nature."

[@bravomike4734]

Since the nervous system of octopus is their brain, one could argue they're regrowing their brains.

[@goawaygosh]

The question Ted asks me as he holds a hacksaw against my left leg.

[@awesomehpt8938]

Axolotls are sooo cute!

[@FaizThe-kc6dk]

Yes it is ☺️

[@jessicajayes8326]

My favorite animal!

[@naveedahmed2417]

My fav Pokemon

[@cry2love]

Last week I found out that Japanese scientists found a way to regrow teeth in humans by unblocking the proteins and now this, science is just amazing!

[@yagomizuma2275]

Junho would be proud

[@hmbtfdcu5539]

That’s great now let’s hope they find a way to regrow lost limbs.

[@naveenraj2008eee]

Hi Ted ed Awesome video. This topic recently I dreamed of and asked question myself. What a coincidence,you posted video. Thanks for answering.

[@banksofbarcelona3893]

Get Hashirama's cells

[@shivtomar5699]

Lmao

[@MasonGreenWeed]

Plot device cell

[@DeepakDanielNesarajDA]

I sensed a summoning jutsu for the fans?!

[@alphabladelm2011]

Try not to die during grave robbing.

[@Pratikmayekar4]

Where are Orochimaru and Kabuto when you need em

[@molybdaen11]

I would love full regeneration. But it would probably cost to much energy and increase the risk of cancer, since modern humans have a very unstable genome.

[@AKG58Z]

If we master this technique we can technically de-age ourselves.

[@arturogonzalez554]

I think that would be so bad

[@areaxisthegurkha]

I mean we technically do. Medicine and Surgical advancements have drastically increased the average age of death. Back in medieval times, you would be lucky to reach even 50.

[@libertyprime1614]

Not really, salamanders aren't immortal.

[@deutschesmaedchen2851]

A fascinating video. Also, it‘s my favourite animator❤

[@althyk]

What is amazing is the new limb is the one lost, not a wrong body part.

[@MartimDev]

That just screams intelligent design

[@Passion84GodAlways]

Absolutely FASCINATING!

[@machinelearninggoddess]

1:38 IT'S AN UPPER RANK! CALL THE HASHIRA! RUN FOR YOUR LIVES!

[@yiffmaster69uwu]

goated reference, had to giggle

[@evanrosman9226]

"who knows what evolutionary knowledge we might grow back."

[@xTexnarelx]

amazing ending phrase.

[@jeanradko5311]

Tagline for the next Jurassic World reboot.

[@waleedabdullahkhan5706]

​@@jeanradko5311ah shi here we go again

[@HMAOO86]

That's gotta be a key to deal with cancer in better ways

[@scottpeg194]

That's how Piccolo regrows his limbs.

[@ireallycantthinkofaname4726]

Great video

[@tsugaru_solos]

Dr. Curtis Conners enters the chat:

[@loszhor]

Hopefully regeneration will come soon!

[@MathewSan_]

Great video 👍

[@hmbtfdcu5539]

This limbs regenerations will make people that are born without limbs and people that are amputated lives a lot more better. I still hope it happens cause for their sake and I hope Kiersten Kelly would get that treatment like that for her missing arm that she was born without. I kinda a big fan of her despite voicing Brooklyn from Jurassic World Chaos Theory. If and when she gets that limb regeneration treatment she’ll be happy and more better.

[@Alias_Anybody]

I think it would probably make just as much sense to focus on the mechanism in human fingertips. Those don't overgrow either after all. Would be amazing if it could ever be used to regrow a full arm.

[@deepaksarkar3657]

1:59 isn't it just integration

[@fsgrgrrgrerh5085]

I think you’re joking, but at risk of missing the joke, no they’re not the same. Differentiation in this context means differently.

[@pyrotechnicalbirdman5356]

​@@fsgrgrrgrerh5085nah bruh, you gotta integrate it.

[@nathannolan1593]

I belive if something small of this nature could be discovered it may be extremely useful to people suffering from awful forms of cancer. Something as simple as the body being able to regrow in damaged cancerous areas of skin or flesh.Very cool concept!😊

[@tashibalampkin8555]

0:43 - 0:50 *That's the cutest thing I ever seen.*

[@Maruchipawa]

We gotta upgrade our skill tree a lil bit more to get that skill

[@utkarshgoyal4423]

@4:03 “Under construction” board got me rolling 😂

[@ItzXenesis]

Bru

[@Simon_Jakle__almost_real_name]

It's said that sea stars/starfishes (i'd call coast stars) regenerate when they were cut in a few pieces, so they would be defined as some kind of zombi creatures (lacking a mass brain whilst sneaking away from potential danger), and some crabs or similar species also regenerate a scissor or plier if that limb part got lost. Or look a some beetles or bugs that move again after gotten freezed.

[@zoltanperei4789]

A Spider-man villian did the same research, but with lizards.

[@TheLifeLessonJournal1985]

very wonderful

[@Alish-629bang]

I am horrified of salamanders

[@blueyyy5961]

Because we'd all become Deadpool

[@FaizThe-kc6dk]

🤔

[@harmonetheanimationaddict4419]

Or The Lizard from Spectacular Spider Man.

[@RayanFarooqui-n8b]

To put it more simply a healing factor

[@julianfull280]

hopefully with no cacncer... but that healing factor would be awesome

[@user-lr8ow2jg4e]

No you’d be a sorry son of a daughter who has to wait a couple of years to grow his limb back and half of that time for it to regain full functionality. That’s if you don’t bleed out.

[@makoman295]

Kinda cool seeing what could be what Dr. Conner's goes for in Spider-Man comics besides just "Lizard DNA = New Arm."

[@Ayvengo21]

Another good topic would some explanation about what does it mean for cell to be old and what it mean to be old as multicellular organism. Looks like we know symptoms of being old but not the reason of it.

[@miggle1875]

Spiny mice do that too? Seems like they should study them the most for possible human applications. Exciting time to be alive! Go crispr!

[@redfoxnutella3926]

Wow this is an interesting topic

[@kirbymarchbarcena]

SALAMANDER: We will not tell our secret. We've seen what happens if you have our regenerative ability SCIENTIST: You've watched the Hulk and Deadpool movies,huh?

[@Gabriel-fi7nv]

We need to lv up our skill set bruh

[@tuvshintuvshinbayr4629]

Grinded enough

[@kudasai2277]

man, we should've spent our skill point on regeneration

[@SalvadorRachmaninoff]

What a coincidence! Our anatomy teacher just recently talked about totipotency and I was wondering if there was a way for humans to do it too.

[@WhooptyDoo]

Love the animation ♥

[@bharathchandrabhuvanagiri8495]

I think we can't grow limbs due to the existence of bones. The calcium deposits required to completely re-establish a limb is a lot more than the tip of fingers or axolot limbs

[@MissLisaBabyx]

So cool and fascinating 😊

[@nguyenphu8509]

Ted-ed teach me more than school

[@johannabonana5306]

This is something I could spend a lifetime researching

[@danielxdvioletaxd]

💜; Esta clase de investigaciones serán el futuro.

[@nocturno7660]

I once had a dream in which I could talk to my body in an out of body experience, I asked him why can't we grow back limbs or be immortal, he said because we're supposed to die in our due time, its for the better. I still think growing back limbs would be cool, specially hands.

[@olgabauerova3303]

Veeery interesting, thank you!!!👍👍👍

[@priscillajimenez27]

It's amazing how a baby grows and develops innthe womb 😄

[@caterinagargiulo]

This is interesting to know

[@ilovedurians02]

Amazing

[@katherineknapp4370]

So cool

[@foxmind2490]

This reminds me of old wooden naval ships would recycle planks of the ship to repair damaged parts of it after a battle.

[@juliuskwak1263]

The idea of humans re-growing lost limbs actually gave me an excellent idea for a series of written works. Imagine in the far future humans have the capability to fully transplant someone's entire brain construct into a new body. Weirdly enough, the body is the recipient and the brain system component is the donor... thing. This would be such a time in the future where 90% of the complications involving nerve connection/re-connection limitations and other complications have been solved and streamlined. Medical science is so advanced that we could even do this with a mechanical chassis and someone could live as a cyborg, mostly machine, but the human component is what drives the ship. So many questions to answer. How long can one's brain age even if the body is ready to die? Could old work with the new? Since hormones primarily affect bodily changes, does that mean a brain from one gender would simply work under the conditions of the other gendered body whilst subjective to the hormonal wirework of that new body? Will the former David now be able to give birth? We have to keep in mind so many things about genetics that from a network of on/off signals to even developmental deprivation (on purpose), a future where humans could reattain a lost physical capability seems so far-fetched and impossible. So much so that any attempt to advance it will only develop and uncover a plethora of problems not originally foreseen. This isn't like the movie Robocop.

[@molybdaen11]

Uh. This had already be done in Perry Rhodan. 😅

[@flavanone9884]

Wow this is interesting

[@godofwarhammer7655]

Magic

[@samueltrusik3251]

We must harvest this ability for ourselves.

[@natheriver8910]

Very fascinant 👏 🔥 👏 🔥 👏

[@171QA]

Neat.

[@KuddlesbergTheFirst]

Does having high durability beat regeneration? You can't heal if you never take damage. And you can't take damage if you were never scratched?

[@عبدالعزيزألأزرق-و5ي]

I love axolotl

[@bharatcosmos7743]

Salamader mastered reverse curse technique 😂

[@isaiahclark1327]

Have you guys tried learning the reversed curse technique?

[@tdman]

That's how Deadpool is so cool. 😎

[@snowballil3133]

Forgot to mention leopard gecko, anole, iguana tails. Im curious why crested gecko tails are different

[@parzival435]

The last time I was this early, I still had a limb

[@bivcbmtgstgtssscqcrddgtrsm2257]

Why. Aren't. We. FUNDING THIS!?!

[@Colbreakz-sv2uh]

I want to make a lose -a-limb joke, but I do not want to use already amputated humor.

[@Lexthefazworker]

Humans can recover from broken bones but that hasn’t caused too much of an issue, though including the speed of the recovery I’d imagine most dangerous weopons would be taken much less quickly.

[@reggiep75]

Salamanders must be in a lot of dangerous fights or accidents to need to regrow limbs.

[@kuroimae-ashihorbuch-kanal6537]

I was actually wondering why some animals are able to do this and most can't. It even starts with the regeneration of teeth, compare sharks with humans or many other mammals. We get a new set of teeth once in the childhood, but not a 3rd time ... why is that so? :/

[@justinehercthehuman]

I wanna know about starfish and flatworms that when cut regrow into different organisms, basically multiplying.

[@ActiasECHO]

Can i ask something If salamanders cant scar and can readily regenerate Does this mean they cant grow stronger through training After all its by scaring that muscles grow and become stronger So would they be able to do it too? Or are they forced to live in a body with a fixed amount of strength and flexibility? And finally, what about slowly forming parts, such as wrinkles, bent body parts(such as fingers) or etc?

[@Caperhere]

We can grow part of our liver too, can’t we? Curious to know if any of the creatures able to regrow limbs ever get cancer.

[@Gitsmasher]

I hope one day some genius would figure it out, like Dr.Connor. I feel bad for veterans who lost limb..

[@vlarion2023]

Wonder if brain cells and organ cells can also be regrown, if we can master that then immortality is achieved.

[@silentbullet2023]

we can, up to 2-3 years of age, grow lost finger tips and etc.

[@Adam_mohammed_]

kudos to Salamander 👌

[@yowat-i9k]

1:05 avocado cell lmao😂😂😂

[@HaThu-lp4pf]

Hello

[@FaizThe-kc6dk]

Hi

[@scrubz5326]

Hiiiiii

[@FaizThe-kc6dk]

​@@scrubz5326🤨🤨🤨🤨🤨

[@Agus-fw7dl]

If I can regenerate: "Thank you for your 100th kidney donation"

[@seedspittinspacecowboy]

Definitely would redefine what I imagine cannibals could do.

[@t5hammer871]

Well I imagine the resource drain on the body would be immense

[@pramodsingh7569]

Thanks

[@amosdraak3536]

But there should be enhanced emphasis on getting this done. Maybe take away from less important projects because this would pave the way for mankind’s ultimate goal- immortality.

[@taktsing4969]

nice

[@FaizThe-kc6dk]

Ok