10 Crucial Things We Didn't Know 100 Years Ago

[@yokoshemp]

When my grandfather was young farming was still done with horses. I have a picture of him plowing with a horse. Autos were new and roads primitive. He saw electric lights put in everyone's home. He saw radios and then televisions become popular. Interstate highways. Regular airline service for ordinary people... with jets. He lived to see men on the moon and a space station orbit the Earth. When grandfather was young... there was no Santa Claus as we know him.

[@animecat3556]

Wow that Sad but Cool at the same time

[@bash6555]

Your grandpa is a lucky man, I'd kills for that

[@Kikilang60]

Thomas Nast gave us the Santa we no, and love to day in 1881, and the first space station was Salyut built by the Soviets in 1971. Your grandfather must have lived to be hundred.

[@colewelden]

@@Kikilang60 not that far fetched. About one in 15 people live that long.

[@helenamcginty4920]

@@bash6555 no you wouldnt. Not unless you were rich (or a married man) and had someone else to do the laundry, by hand, cook everything from scratch, including bread every day. (Actually I have seen that done and do it myself but then I am 73 and grew up in postvwar England, no fridges, my mum had no washing machine till I was 5 and the 4th child was born...) few cars, if you needed hospital quickly, tough. Plus my mum grew up knowing that people only went to hospital if they were at death's door. Who do you think cleaned the outdoor toilets of countryside dwellers? Yup. The man of the house. It was also his job to polish the family shoes every evening. Maybe he even had a last and mended them to save money, like my dad.oh yes, I forgot. Most working men were lucky to see 60 let alone 70. Even in my youth. Their bodies were worn out by the physical labour of much of their employment.

[@jonathanmoore6552]

Rosalind Franklin was the scientist who experimented with X-ray diffraction. She developed photo 51 but one of her colleagues gave a copy to Watson and crick who guessed and checked until they found the right shape. Rosalind meanwhile proved the location of each molecule in the DNA structure but published her work after Watson and crick.

[@SatumainenOlento]

She should have got part of the credit!!! While watching this video I felt there was something not right there. It's always who published first and not necessary who worked on the theory for many years.

[@ShadnicK826]

This is my new favorite SciShow episode. Really puts scientific progress in context

[@dbartholemewfox]

+

[@reedcspurling]

+

[@theultimategamer6658]

+

[@dennisplayinglacrosse]

-

[@Infinit3Enigma]

+\-

[@hydronpowers9014]

I wonder what we will learn in the next 100 years after watching this

[@MousePounder]

+

[@FocusMrbjarke]

Hopefully how to terraform planets so it won't have to take lifetimes

[@claeshenriksson5702]

We will learn that everything discovered the last century actually is false

[@njm92495]

Well learn that Pokemon go starts ww3

[@nite--o-chondria]

GO TEAM VALOR

[@juannunez5767]

Makes you wonder what we will know by 2116. That is, if we don't destroy everything.

[@stardreamer8996]

Well for starters we'll know if we destroyed everything...

[@MrPatatogamer]

we proberlly will though

[@AppleberrySmith]

+

[@TetraSky]

Don't care, won't be there. I'm not about to live to 127.

[@angelchama1874]

the internet will save us i trust him

[@galileor.cuevas9739]

Watson and Crick just made suppositions, while Rosalind Franklin continued her investigation, so that means that the one who really deserved the novel was Rosalind.

[@cfltheman]

100 years ago, the Ottoman Empire still existed.

[@jaimie00]

+

[@MarioSanchezAbelenda]

Well, they were more like "crumbling".

[@AppleberrySmith]

+

[@linneaskoglund8171]

+

[@alveolate]

classified as empires? european kingdoms labelled themselves imperial.

[@dbartholemewfox]

I really liked this video! Hearing how cutting edge discoveries from several decades ago are now trivial facts learned by elementary children makes me think 'controversial' topics of today will be trivial in a few decades. Surely in 100 years it will be as silly to doubt global warming as it is to doubt plate tectonics now.

[@DrgnZip]

Assuming there's anyone around 100 years from now to doubt anything.

[@theultimategamer6658]

+

[@entropyzero5588]

+Dan Fox Well, considering the fact that there are still people around who think the Earth is flat I'm not so certain... :/

[@vitas75]

one thing evolution didn't fix - human stupidity.

[@mariposahorribilis]

+

[@TheStarBlack]

Well done for including Franklin and Wilkins in the discovery of DNA's structure. Watson and Crick have been given all the credit for too long!

[@pnkflyd66]

Ok so this neutron walks into a bar, orders a drink, opens his wallet to pay when the bartender shakes his head and says “for you, no charge”

[@jaimie00]

+

[@treys0sa]

That was one positive joke

[@JohnSearleFangirl]

I like

[@ronniessebaggala362]

Neutrino or netriyes? ... no

[@araknidude]

+Flatter Black brilliant

[@spoonlickerw.3294]

I'm a simple Hungarian. I see Albert Szent-Györgyi, I upvote.

[@Ian_sothejokeworks]

This may be the funniest comment on the internet.

[@reinux]

Next video: 100 things we didn't know 10 years ago

[@mollof7893]

69 things we didn't know last year.

[@theeye7776]

reinux 100 things we didnt know yesterday

[@itsjen3757]

The second one, Rosalind Franklin was actually a crucial part of the discovery, but because she was a woman she didn't get recognition at all.

[@whatiwouldnotgive20]

She unfortunately passed before she could further her studies, most likely due to the radiation she was exposed to during experimentation. Watson and Crick """took""" (re: stole) her work and used it to further their own studies without giving her any of the credit. Without Rosalind Franklin's work, W & C wouldn't have been able to draw the conclusions they did. They also later accepted a Noble Prize that should have rightfully gone to Franklin without mentioning her. Such an infuriating story that Franklin's life's work got ripped away from her, and one that is also far too common. Women have worked, and continue to work, so hard to be recognized for their accomplishments.

[@johneyon5257]

the video's approach gives Franklin more credit than she deserves - she failed to recognize "wet" nature until too late - Watson did when shown the x-ray - informing Crick they blended the data they had accumulated and came up with the correct structure first - franklin's name has emerged later due to the women's movement as a victim of male prejudice - and not her own misanthropy (she was considered "difficult" even by other women scientists who worked with her) - and she's been declared the "overlooked" discoverer despite the constant mention of her name - well there's another overlooked discoverer - hardly ever mentioned cuz he's male - raymond gosling of the maurice wilkin's team - look him up

[@soheil527]

@@whatiwouldnotgive20stupid femicunt comment. without western men building the university and al the previous sciences she would have been nothing

[@mjmajin]

You’re ugly-minded

[@SK-fz1oq]

@@soheil527 till achieved more than you ever will.. And btw are YOU a western man?? lol no. Let the western world handle their own problems. Now go blow up something in the name of religion - that's what you are good at. Also don't forget to oppress women in every way possible - another specialty of your kind :)

[@StefanVeenstra]

+SciShow next up, 100 things we didn't know 10 years ago.

[@commentvigilante]

Number 1: A bloated toupée can run for president.

[@NinjaOnANinja]

Well, one thing we did know was that you were going to bring up that idea.

[@Shad0wBl0wer]

"presidential candidates could win just by stating their gender every 5 minutes!"

[@vekayu]

+Jakob “J-Bonken” Kübler This is a science channel. No politics.

[@StefanVeenstra]

Evan Strasburger Ah, but there's science behind politics. Where did it come from and why do people all over the world let themselves be governed by jackasses whoes only interest is their own wallet?

[@Belicose777]

Here's an interesting concept. If you can zip to about 2000 light years away from earth instantaneously and looked at earth through a super strong telescope would you be able to see the Height of the Roman Empire? Light really carries sooooo much more data and information than I've ever thought. Technically speaking that point in time continues to travel throughout the universe at the speed of light.

[@dylancole3141]

Huh. I never thought of light like that. Holy shit, you blew my fucking mind! :D

[@Ghostowl657]

Yes

[@kristafarmer4803]

okay but it takes 2000 years for you to get there (assuming you move at light speed) so you would see what's happening now. what happened right when you left the earth.

[@ethanmemelord2727]

Well technically you can't travel faster than light, so no but technically if you could teleport far away with a infinetly strong telescope then yes, you could :)

[@garethdean6382]

And it spreads out too, so you'd need to collect a lot of light indeed to be able to see anything, and you'd only be able to see what was open to the sky (And not under clouds or at night or...)

[@ronkirk5099]

Being born in 1950, I feel like I've lived in a pretty amazing time. Science has made so many amazing new discoveries (I'm a retired engineer so I admit to being a science geek). There is so much more to learn, but we have come a very long way from myth and superstition. The Hubble deep field view of the cosmos is just a total mind blower!

[@DragoniteSpam]

I really hope I'm still alive in a hundred years and can watch the 2100 version of this video.

[@lovehearts9710]

Me to but im already 21 so i don't think i will make it

[@warpdrive9229]

I am very proud of mankind. Our scientific progress has been amazing. If this continues, we surely will have a bright future.

[@phantasm1234]

Can you do one on cerebral aneurysms? I had one rupture at 19 and would love to learn more!

[@IDidntAskU]

Not trying to be insensitive at all, but do you feel like any increase or decrease in your mental health after? I always wondered that because I had a very high fever when I was a kid and i feel like certain things changed after.

[@KadeKalka]

I never thought about this, but SciShow's editing is really fantastic. Everything just flows perfectly.

[@Countdowntodoomsday93]

i bet 100 years ago they didnt know that 15 minutes you could save 15% percent or more on car insurance by switching to geico.

[@TheViolaBuddy]

This was a really fascinating episode - there's actually a lot of stuff that we know now that are actually surprisingly recent discoveries!

[@PatrickAllenNL]

Make this video again but then call it '10 things we did not know 1 year ago' Do that every year...thank me later for coming up with that idea

[@BreezyInterwebs]

I honestly think that's a cool idea, like a one-year recap of science.

[@docdude110]

thatd be awesome

[@LoneWolf-wp9dn]

or since 2000

[@Iwillbecomeworthy1]

brilliant idea!! that will be very useful for everyone

[@epicsquidy123]

+

[@berglettemom6045]

It's always nice to see Michael Aranda.

[@dhu192]

I didn't know you will make this video today.

[@dhu192]

*Doesn't get a joke*

[@natttomes4588]

nope

[@inakibolivar664]

fucking worst joke ever

[@natttomes4588]

iñaki bolivar this is

[@dhu192]

natt tomes I seen worse jokes.

[@TheDevler23]

I can't begin to tell you how much I appreciate you talking about the female scientists involved with the discovery of the shape of DNA. So many people skip the women of most major breakthroughs and just talk about the men who got the credit. And you showed how easy it is to include them without making a big deal about it. I know this video is two years old, but it's something I love about this cluster of channels. Keep it up, please. It's such a needed example.

[@5micky2]

We didn't know that one day 2 people thousands of miles apart would be able to speak to each other by talking to an Apple.

[@ThomasAlanCarpenter]

Honestly, Michael Aranda is a great host. Material items shouldn't matter. Hosting is harder than people think.

[@ReeCocho]

Hehehh, Hooker telescope.

[@TorquemadaTwist]

It's how pimps find stars.

[@Lustanda]

the pimps in our stars?

[@冬-01]

+Đỗ Đức Huy (4T) lmao

[@garethdean6382]

What? Nobody replied with 'It's used to study Uranus' yet?

+Bruce Dunn is that a wkuk reference?

[@JasonKlein97]

more of these please! I'd like for this to be turned into a sort of miniseries... There are so many things you havent touched on.... like oh I dont Know COMPUTERS?! Television? Even light switches and hydraulics... There is so much more you can touch on. I really enjoyed it too, hope more are coming!

[@garethdean6382]

That's all tech, we knew the concepts behind it, we just hadn't applied it Might make an interesting counterpart, things we hadn't built a century ago...

[@cheea5]

You should do an episode on the endosymbiotic theory.

[@natttomes4588]

what is that

[@cheea5]

+natt tomes It's kind of complicated, but it's where we believe chloroplasts and mitochondria came from. Basically eukaryotes ate some prokaryotes and they co-evolved.

[@dismae_]

I'm pretty sure they went over that a bit in A Brief History of Life, Part 1. it's a couple videos ago, and really freaking awesome

[@cobalius]

That would be nice

[@内藤イズミ-b6l]

I'm in love with his voice. It sounds very soft and calm

[@Fjolltzu]

I used to not like Aranda, but he grew on me alot. Its almost as if i could snuggle with him :-)

[@TorquemadaTwist]

It's the vest, so soft and inviting.

[@dinosaurznspace]

Confirming the existence of Gravitational Waves is truly an amazing discovery. Einstein was a cool fella

[@ZeroSumJ1]

Michael: Upvote

[@SnoozeTheRecluse]

Lol

[@nitishachaudhary3867]

Scishow is my stress-buster!

[@dendroxden440]

Someone will make a video like this in 100 years and if we were to watch it, our jaws would have to be surgically removed from the ground after they hit it.

[@Butwheredotheducksgo]

they probably will if we don't wipe ourselves out in a nuclear war

[@dendroxden440]

+Phoenix Yeah I could see that happening within the next 100 years actually. Our planet also will likely be uninhabitable by the year 3000 (being really generous) If we keep doing things that we are at the pace that we are.

[@enosbaltazar713]

This deserves more likes lmao

[@ScottCarroll]

in 100 years, we won't need jaws.

[@JustinShaedo]

Nice solid 10! Great vid SciShow!

[@Danmandingo]

*Thoughts & prayers go out, to the officers who were just killed and wounded, over in Baton Rouge.* #AllLivesMatter

[@igotbandTHEFROG]

fuck12

[@l0lLorenzol0l]

BLM is a terror organization. Fuck them and fuck Shaun King.

[@SnoozeTheRecluse]

BLM had nothing to do with the shootings it was a peaceful protest. The sniper hated blm protest and corrupted white cops mistreating black people.

[@HouzaUchiha13]

Wrong video buddy. Also, instead of sending thoughts and doing nothing why don't you donate if you feel so bad for them?

[@postyoda]

All lives matter is a very true but trivial and given slogan; black lives matter has an implicit "too" at the end, rendering that kind of response ill-conceived.

[@dalivserrato]

Hey guys, great video! Absolutely loved it. Just one detail I noticed: at the CFC's point, the Nobel Prize in Chemistry Michael mentions, wasn't earned in 1975; it was actually earned in 1995 by Mario Molina, Paul Crutzen and Frank Sherwood. It's even more surprising to know that, not more than 30 years have passed, since we humans have actually taken measures against our negative impact on the planet. Keep up the great work!

[@jacksainthill8974]

You didn't know anything a hundred years ago and neither did most of us watching.

[@Soma2501]

This was very inspiring. Thank you SciShow.

[@FooledbyRandomness2]

It's the middle of july, why are u warring a jaket indoors ???

[@SlimeMage32]

Why can you not spell

[@griffin4cats]

Extreme AC

[@treys0sa]

+Tyler Whiteoak Savage

[@1db1db1db]

gotta commit to the style dude

[@_hector__]

Ive seen other kids use jackets OUTSIDE when its at 100 degrees

[@hollyTM]

My great grandmother who lived to be 101 passed away about a week ago and she used to tell me stories about how life was life during certain years. It was amazing, the woman had the best memory.

[@TheManUtdGuy]

Sounds like we haven't done a lot in the last 50 years or so. I guess we can blame that on the internet.

[@sullicait]

Favorite ever SciShow vid. We are so small. ❤️

[@ellenjarrard7920]

At first I thought you said "About half the people alive today are over 100" and I was thinking "WHAT THE F-"

[@TheHonoredWun]

UCK

[@avi_mukesh]

More videos like this! Bringing together Chemistry Physics and Biology, I love it! 20th century science is so unbelievably interesting.

[@kelechi9854]

How to start a KZbin war: Rabbits are a lot more cute than ducks.

[@typemoon4894]

nice war

[@PoulpeMalade_]

insane war

[@Akash-ue5uq]

😂😂😂

[@ramuk1127]

*cuter

[@tenderhearthero9602]

This is so cool to watch and see how in the space of 100 years how much we came to learn so many truths! I love this show~

[@terryturner9576]

Wow only 10 things we didn't know 100 years ago? We are progressing much slower than i thought. XD

[@SimNico]

You should also have made "10 things we didn't know 10 years ago" :) Great video as always

[@rayhs1984]

The same guy that invented CFCs (Thomas Midgley Jr) also invented leaded gasoline. He is the worst person ever.

[@garethdean6382]

But sadly not deliberately evil. He had a karmic death too.

[@neeneko]

deliberate evil is almost non-existent, and such cases are usually too dysfunctional to actual be any large scale harm. People generally believe they are doing the right thing within their ethical framework and priorities.

[@serinad9434]

Even more sadly, in both cases be was actually trying to help. The gases previously used in fridges, that he replaced with CFCs, were actively toxic (such as ammonia or sulfur dioxide). And the leaded gasoline he created was to stop car engines knocking, and therefore getting damaged and wearing out so quickly. I always felt rather sorry for him, in a way.

[@cOmAtOrAn]

And then on the other hand there's Fritz Haber, who tried to figure out how to make bombs and ended up feeding a billion people. It's a strange, strange world we live in.

[@garethdean6382]

cOmAtOrAn To be fair, he did make some bombs. I guess nothing ever ends up wholly bad or good.

[@craftykittygaming7820]

Wow, it's amazing how far we've come in just a century. Keep up the good work guys!

[@Master_Therion]

Wait, about that last fact, General Relativity isn't a person? It's a theory Albert Einstein came up with? Whenever I heard "According to General Relativity..." or "General Relativity predicts..." I thought they meant a military commander who was also a great scientist. Wow, I feel like I need to reexamine everything I thought I knew about science :(

[@littlechickeyhudak]

Master Therion LMAO I thought was a joke at first. I’m sorry, but this is absolutely hilarious

[@paulaplantita8458]

Is this serious? :))))))))))))

[@paulaplantita8458]

Sorry but this just made me laugh. :))

[@Tonatsi]

That’s because they shortened “according to the theory of general relativity” or “the theory of general relativity predicts”... Notation is important people!

[@Tonatsi]

Master Therion *CONGRATULATIONS, YOU HAVE WON THE **_DUMB YET COMPLETELY UNDERSTANDABLE MISUNDERSTANDING_** AWARD*

[@livin4thelamb499]

Seriously, this was so interesting and knowing the whole world of science is just waiting for us to understand it makes me want to cry.

[@jacksoncarder8103]

This guys wearing a jacket while its 102 degrees f where I am

[@davidson2727what]

He is also inside a building.

[@Outland9000]

Your point? :-)

[@SatumainenOlento]

This made me realize what actually drives all the scientists...because it is like exploration to unknown...an adventure...there is so much yet to know!!! I am kind of getting excited to know more myself!...

[@BigPoppaShawarma]

"Chemicals are making holes in the atmosphere" "Chemicals are making the atmosphere thicker"

[@frostykittens]

...

[@gizatsby]

not that kind of hole :p cfcs were reducing ozone concentration, not making literal holes in the atmosphere.

[@garethdean6382]

'Blowing on cold hands warms them up.' 'Blowing on hot soup cools it down.'

[@Hudson316]

Ozone is a molecule of 3 Oxygen atoms. It reacts with UV light so that the UV is absorbed to split one oxygen off to form O2 and a loose Oxygen which then attaches to a free O2 molecule to form more Ozone. This reaction shields the surface from a large quantity of UV light from the sun. Chlorofluorocarbons (CFCs) react with the Ozone layer and sequester that free oxygen to prevent the formation of new ozone. This results in the Ozone layer depleting as it is losing ozone faster than it is re-forming. Carbon Dioxide, however, when added to the atmosphere, increases the ability of the atmosphere to reflect infrared radiation back toward the ground when it would usually escape back into space as waste heat. Some amount of CO2 is required for the planet to stay warm enough for life, but too much CO2 results in too much infrared radiation being prevented from escaping, leading to an increased atmospheric temperature (which technically due to heat expansion does actually make the atmosphere expand slightly, technically...)

[@frostykittens]

James Austin thank you

[@the1butterfly]

I'd love to see this episode re-done in a hundred years.

[@gummel82]

100 years ago Britain was still in the EU.

[@stardreamer8996]

:P 100 years ago the EU didn't even exist.

[@SurgeUnleashed]

100 years ago there was no EU.

[@pateardealul2048]

100 years ago there was no EU :P

[@theperpetual8348]

The EU didn't exist before the 70s?

[@the_feisty_yeti_4101]

It wasn't, actually. We joined the EU around 1960-1970 ish time

[@Linkous12]

"By the Gods, Lucius, that gladius wound is terrible!" "I know Maximus! What should I do? ...wait. That piece of moldy bread, hurry!"

[@MrTheenDx]

Why does rocking our bodies help us to sleep?

[@TorquemadaTwist]

Ask Justin Timberlake.

[@ThavronMakes]

+BruceDunn Way too far down.

[@Cami96]

Maybe it takes your subconscious back to the protectiveness of your mother's womb?

[@MrTheenDx]

***** It might have something to do with that, not sure. I want SciShow to answer that.

[@MrTheenDx]

***** That's odd..

[@tomdrowry]

'Penicilin has saved a lot of lives', that is more than an understatement.

[@JL-yg3ku]

I just realized how much humans think it's just us, us, us

[@Mad_S]

My great grand mother passed away tuesday, she was 95. It's crazy to think that even though she told us thousands of stories, I hardly knew what she has lived through. She lived through so many amazing events. I feel like I should have asked her more questions about her life and all the things she was able to witness. The views she had and the life she lived.

[@woodsdontcare6404]

1. Pornhub exists

[@teatoxic8563]

this was awesome, thanks!

[@AnkurRoy-bi9yz]

Flat Earthers, Creationists and Climate Change deniers are gonna get mad at this video. Lol

[@ArtanisOwns]

welcome back aranda i love u

[@kitwotted]

There's a Hooker Telescope. Naughty, naughty scientists...

[@kablamo9999]

The past century has been an explosion of new knowledge. The next century should be pretty interesting!

[@oxcart4172]

Great! but Fleming took the credit for discovering penicillin -he didn't discover it!

I'm glad to see this comment, It was a Costa Rican Scientist: en.wikipedia.org/wiki/Clodomiro_Picado_Twight

FlappableBean Interesting, I'm shock to learn more about this, this is not the 1st time we see this kind of "weird" issues when filing a patent so Thank you for bringing this up. I'll look it up

[@SalahEddineH]

Someone gets corrected on KZbin, and thanks the person who corrected him, and says I'll look it up, I wanna know more... Don't you know how to use to internet? You're supposed to argue, and get angry, and stand your ground, even when all the evidence goes against you! :D Sorry for butting in. Just my way of saying I liked this exchange of information. You people are the good side of the internet. Cheers!

[@FernandoGonzalezJay]

I love this channel!

[@johntitor7989]

God hates carbon 14

[@johntitor7989]

And nouns

[@b.sylphaen]

Which god? Mine are pretty good with it.

[@tgg1217]

+Priscilla Ferrari george lopez

[@gnouveli]

radiocarbon

[@capnbubbles5329]

+tgg1217 That's a spooky god 3spooky9me

[@waltersumofan]

That was fun. Make this a series!

[@reesebaldwin3506]

penicillin = the wonder drug tis a shame that I'm deathly allergic to it.

[@mikeycarter]

Same

[@dunsparceislife2156]

Sucks to be you

[@Saareem]

Thankfully there are probably some 20 other antibiotics to choose from.

[@Owiko7]

Same

[@hallieeramos]

3:27 I love that picture of Fleming :D He's like "Do you mind? I'm kinda busy saving billions of lives! Geez."

[@perpetualpolymath5961]

Number 1: We did know the earth is spherical.

[@Articulate99]

Always interesting, thank you.

[@TrustYouMe]

2:46 You didn't need the "(female)" label in the diagram next to the ovaries. lol

[@garethdean6382]

Given the state of sex education, maybe he did.

[@typemoon4894]

YOU BIGOT!!!!!!! YOU'RE LUCKY THIS ISN'T TUMBLR!!!!

[@garethdean6382]

type moon As a Tumbler I disagree, labeling that diagram like that limits its freedom of expression. What if it doesn't want to conform to society's notions of gender?

[@bishop51807]

WHAT! Scientifically speaking a female is of or denoting the sex that can bear offspring or produce eggs, distinguished biologically by the production of gametes (ova) that can be fertilized by male gametes. You or society dose not defined what a female is science does. If it has feathers and a bill its a duck!

[@TrustYouMe]

Scientifically speaking, you're overthinking it.

[@MrAntieMatter]

I don't know about you guys, but that fact at the start of the video was, to me, the most interesting part of the video.

[@filipkovarik4028]

Pangea wasn't the first continent. There have been literally billions of years of continental drift before Pangea. Such a rookie mistake... Shamefur dispray

[@ryuuwyvern90]

Amazing what knowledge we take for granted, it's difficult to imagine that people once didn't know about neutrons, tectonic plates and other galaxies.

[@caitlinveal5709]

Is it wierd that this stuff relaxes me?

[@aelliixx]

I like how there's a lot of channels dedicated for top countdowns and SciShow comes outta nowhere and blows everyone out of the water..

[@justanotherandomanon]

It's crazy that so many of the things we take as common fact today were mind-blowing discoveries merely a century ago!

[@francescamele8077]

Great video, loved it!

[@bestcreations4703]

“1500 years ago, everybody "knew" that the earth was the center of the universe. 500 years ago, everybody "knew" that the earth was flat. And 15 minutes ago, you "knew" that humans were alone on this planet. Imagine what you'll "know" tomorrow.” A MIB quote that has stuck with me since childhood.

[@chiquilio]

I would love if you guys could talk about Clodomiro Picado and his achievements, he discovered penicillin before Fleming and did a great work with antivenins :)

[@geeta172]

Do something like this every year!

[@JohnAPerez-fh5jt]

I want to learn more about the gravitational waves, please do a video about that

[@thetruthfulchannel6348]

Great video! :-)

[@SecksyMan]

thank you for the information!

[@SamuelTBrooks]

This is a really clever concept for a video.

[@jasonbean7296]

I knew all this, but still enjoyed the review. good ol' Crick and Watson.

[@mimuga5419]

By far myvfavorite video fron scishow

[@elliottbarela626]

I went to the PNW location of LIGO, it was super cool. I live about an hour away from it, they have a lot of interesting interactive stuff that demonstrates gravitational waves and all that jazz

[@necrisro]

Watching this makes me wonder what amazing things we didn't discover or understand yet that could be under our noses.

[@schuylermeyers6353]

No doubt, awesome vid, I was wondering about significant discoveries in past centuries. Any thoughts? Are they as important to that century and could the twentieth century been so full of wonder without them? If you've already covered this in crash course history, could you post a link or is that pretty much what the whole course was about?