Sensation and Perception: Crash Course Psychology #5

Рет қаралды 4,877,410

Күн бұрын

Just what is the difference between sensing and perceiving? And how does vision actually work? And what does this have to do with a Corgi? In this episode of Crash Course Psychology, Hank takes us on a journey through the brain to better explain these and other concepts. Plus, you know, CORGI!
Want more videos about psychology? Check out our sister channel SciShow Psych at / scishowpsych !
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Chapters:
Introduction: Face Blindness (Prosopagnosia) 00:00
Sensation vs. Perception 0:54
Sense Thresholds 1:43
How Human Vision Works 4:23
Visible Light Spectrum 5:00
How the Human Eye Processes Light 6:01
Rods & Cones 6:31
Human Color Vision 6:56
Visual Cortex 8:02
Parallel Processing 9:30
Review & Credits 9:52
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Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashcourse
Twitter - / thecrashcourse
Instagram - / thecrashcourse
CC Kids: / crashcoursekids

Пікірлер: 1 800

@carolchen2320 8 жыл бұрын

That's right, I am your average binge watching crash course kid a night before AP psych exam. Are you guys with me?!!

@isaihhernandez9991 8 жыл бұрын

Heck yeah I am!

@diegozunun9821 8 жыл бұрын

yup... lol

@phoebechan4378 8 жыл бұрын

+JP Alpha My exam is 9:30 am on Monday T_T

@marivadeborde1315 8 жыл бұрын

I was with you lol. Didn't see this till now.

@TarryGames 8 жыл бұрын

I'm a middle schooler so you don't have the right to call yourself a kid :p

@crosbywhittington4879 5 жыл бұрын

I am dying right because i'm swamped with Psychology homework, but that corgi just made me feel so much better. I vote to have the Corgi in every crash course video

@cianodwyer5144 9 жыл бұрын

Someone, somewhere realized they were color blind while watching this video lol

@thebarbellpath1040 4 жыл бұрын

i did

@wmcpromo 4 жыл бұрын

That's a interesting perception

@thescientist7753 4 жыл бұрын

@@thebarbellpath1040 f

@deepakraghav8235 4 жыл бұрын

I realized too.. 😂

@a_Rand0m_Guy 7 жыл бұрын

i love the absolute randomness of the sherbert part like that has nothing to do with psychology and almost nothing to do with the video but they invluded it anyway

@SharukhSaifi 5 жыл бұрын

It has mate

@christopherlokey691 10 жыл бұрын

You explained waves better in 30 seconds than my physics teacher did in 47 minutes. And you did it in a psychology video. I'm impressed.

@Linkous12 10 жыл бұрын

I have a Bachelor's degree in Psychology, and I am amazed by how little I learned about neurology and physiology. Hank's teaching me more about these things than my college education did. Go higher education! Oh, and thanks Hank!

@danspearo6893 8 жыл бұрын

Understanding perception from lecture = no. Understanding perception from psychology crash course = yes! When are you guys making more videos/lessons? So helpful, thank you!!

@Kissarai 10 жыл бұрын

I had to rewatch some of that. When the corgi showed up all my attention was wrapped up in "OMG OMG OMG OMG SO CUTE CAN'T HANDLE OMG CUTE."

@Edgelordess 6 жыл бұрын

I think thats the point, becuase thats a form of perception.

@rufusmassey899 5 жыл бұрын

Ofcourse you're a young white female

@seyramagudu5237 4 жыл бұрын

"Someone just told me the word 'sherbert' doesn't exist." "His name is Michael Aranda and he's a dumbhead." "ASK GOOGLE ABOUT SHERBERT!" I love Hank Green.

@user-cs7dt8zg4x 4 жыл бұрын

Lol technically he was right though- "Sherbet" is how it's spelled /pronounced but a lot of people add that R into it (I usually do because it's what I'm used to saying )

@floreadanacatalina1055 8 жыл бұрын

you lost all my attention at the part with the corgi i'm sorry

@Aerchain 8 жыл бұрын

fr i was to focus on the dog i was like omg tbh i startedthinking of cowboy bebop

@floreadanacatalina1055 8 жыл бұрын

:)) i kno

@jacksparrowismydaddy 8 жыл бұрын

+Florea Dana Catalina yeah corgis are distracting. now I have to replay the whole thing and filter out the cute little land seal.

@floreadanacatalina1055 8 жыл бұрын

i did that, it didn't help :))

@BigBoss-sm9xj 8 жыл бұрын

Same!!

@qwertylazerti 9 жыл бұрын

Hank has a Corgi on his lap!!! Omg! So cute!

@syntacticalcrab 8 жыл бұрын

Mustache Guy This entire video is just adorbs.

@child9125 8 жыл бұрын

+Mustache Guy I could not pay attention to anything else.

@MauroEnfermoDeLepra 9 жыл бұрын

Funny thing, my native language is spanish, yet thanks to this courses I know a lot of words in English that I have no idea in Spanish

@ehh1997 9 жыл бұрын

Of course its psychology

@superbucko8640 9 жыл бұрын

Tyrion Lannister English has more words than Spanish does, so there might just not be a word for it. Or you haven't progressed that far in your language :)

@AndresDiazR 9 жыл бұрын

Super Bucko I think he is talking about technical words because the same happens to me. I am a native spanish speaker but I study overseas, and I am learning jargon which equivalent I do not know in spanish because I never studied such subjects back in my country.

@superbucko8640 9 жыл бұрын

Andres Diaz That is what I meant. Although there are regular English words that don't have a word in Spanish, and a bit vice versa.

@thevoidtalksback683 9 жыл бұрын

Tyrion Lannister I am greek and whenever I try to explain the video to my friends I take english words and just say them by putting greek endings to them like ''ya that's a word''.

@abigailnorma775 5 жыл бұрын

AP Psych 2019 anyone? Good luck on the exam!!!

@samfenn3948 5 жыл бұрын

Abby Nogueira omg YES IM ~slightly~ cramming for the test in CST

@iRaven-_- 5 жыл бұрын

No. Im just watching it for knowledge, why everyone saying that.

@zadams1816 5 жыл бұрын

I needed this comment haha

@sarahhamdan5470 4 жыл бұрын

I have a question, what does this have to do with psychology??

@zadams1816 4 жыл бұрын

@@sarahhamdan5470 it's a huge section in cognitive or neuropsychology. Psychology students have to study some physiology like the brain and how perception works etc

@itsagreyworld3371 9 жыл бұрын

That dog is so fucking confused. The whole time he was trying to figure out wtf Hank was doing with his hands.

@flowers2312 8 жыл бұрын

I do the same thing with my dog actually lol

@Carter4240 8 жыл бұрын

I have a corgi and they will try to follow you hands because they think your trying to play

@simplymaci 6 жыл бұрын

Idk who's more precious, the corgi or Hank Green 😂

@atheris1641 6 жыл бұрын

simplymaci the answer: both 😂

@anushkapandey4957 5 жыл бұрын

simplymaci got it right!!!!!

@dustindurfee7066 5 жыл бұрын

Definitely Hank!

@kaziiqbal7257 5 жыл бұрын

The corgi.

@MsKeksPudding 6 жыл бұрын

I love how we're actually using his as educational material in our Psychology Bachelor course! Nice explanations!

@fiercekrypton 9 жыл бұрын

Philosophy series please.

@TheStrangestMist 8 жыл бұрын

+Thomas And math. I'm dying in Pre-Calculus right now.

@TheStrangestMist 8 жыл бұрын

***** Thank you!

@steampunkengi5805 7 жыл бұрын

top kek.

@crashcourse 10 жыл бұрын

@OmerAliuddin 10 жыл бұрын

ITS HERE! :o!

@yusuphabayo4932 10 жыл бұрын

Nice..

@mistahmalinali3438 10 жыл бұрын

I likes this vid

@billswingle2672 10 жыл бұрын

Golly the detail of your lesson is impressive. I can only guess how much effort went into creating this. Kudos to you and the team.

@RasmusBugge 10 жыл бұрын

I would love a crash course - Philosophy - Rasmus from Denmark

@kambojsbTech 8 жыл бұрын

ap psych hoping for a 4 right now

@NoName-bc9lr 8 жыл бұрын

+kamboj sb omg same. i just want a 3 tho cuz im not so smart in there. :P tmrw is our exam. :( ughhhhh

@taylordunlavy9546 8 жыл бұрын

+kamboj sb same

@Ghostshado98 8 жыл бұрын

Hopefully I'll get a 3, but I think I can slide with a 4. Gura, I'm so nervous!

@Ghostshado98 8 жыл бұрын

XP yea. wasn't too bad tho

@sithys 9 жыл бұрын

This video is so interesting, I can't wait to learn more about...... THAT CORGI LOOKS SO HAPPY.

@nine49four 10 жыл бұрын

I'm studying psychology and the topics of these videos coincide with the topics I'm learning at university. I'm paying thousands of dollars for this material at university, yet your videos are better. Love it.

@bhyjazjazz373 9 жыл бұрын

Can u guys do a philosophy series where you talk about things like existentialism and other such things

@lightningkiki6090 5 жыл бұрын

They have now. Yay!!!

@Blackgirltries 10 жыл бұрын

I'm so glad you started making psychology this semester! it's like you were meant to help me! I have a test tomorrow & you are on the same track as my psychology class! I'm sooo grateful

@DannyMercer1993 10 жыл бұрын

As an anatomist, can I just say that this was brilliant. The calibre of the scientific content, friendly "layman" presentation, and fabulous animation is how things should be taught in this age. Its just ace :P

@ES-xx2jq 5 жыл бұрын

I've spent a week learning this stuff for a university exam next week and you just give me all of it in 10 minutes. The more I learn the more I appreciate the quality of crash course😍

@finnigankeane 6 ай бұрын

You covered more than 7 seven ap videos in 10 minutes. Absolutely insane!

@kal4636 9 жыл бұрын

When youre trying to learn about psychology but... Corgi

@SeitanSaidDance1 10 жыл бұрын

This was great. I really hope Crash Corgi becomes a regular feature.

@AldoConstenla 7 жыл бұрын

I'll never run out of things to watch with this channel... I feel so happy I found it. This is a terrific job, really impressive. Thanks a lot for all this content, I am amazed!

@x0xNikkiWx0x 9 жыл бұрын

On behalf of all those who have a psychology exam tomorrow THANK YOU :D So many of your Psychology videos have been incredibly helpful!

@Selene147 10 жыл бұрын

This video makes my brain happy. Thank you for inspiring me to think (and think quickly!) and examine questions about things that are so often taken for granted. Our brains and minds and bodies and selves are all so uniquely complex. It's miraculous. This world is such a beautiful place. And it's so good to stop and appreciate that we can see it at all.

@fakjbf 10 жыл бұрын

"....which can get complicated quickly, and can even get downright philosophical." Best quote from the episode :)

@DanThePropMan 10 жыл бұрын

Not "His name is Michael Aranda, and he is a dumbhead"?

@AlexHider 9 жыл бұрын

3:33 that corgi is CHILL

@GhostsAreReall 9 жыл бұрын

A PUPPY!!! I love crash course even more! :3

@alittlebritobsessed 10 жыл бұрын

Michael Aranda does such an awesome job on these visuals! I love how beautiful these animations are ^_^ And thanks for the informative video Hank! Your CrashCourse biology, ecology, psych and chemistry have always been there for my last minute cramming :)

@beccarmagie 9 жыл бұрын

I love these videos I just graduated in Psychology with the aim of becoming a clinical psychologist. I would like to point out a slight inaccuracy, the left hemisphere of the brain receives input from the right hemispheres of BOTH eyes, and vice versa, the left brain does not control the right eye but rather the right visual space from both eyes.

@beccarmagie 9 жыл бұрын

Which is what I said, the left brain receives info from both right hemispheres, i.e. the right hemisphere from the left and right eyes, and vice versa.

@marivadeborde1315 8 жыл бұрын

Who else is here cramming for AP psych lol

@bennybateman9942 7 жыл бұрын

The doggo is such a distraction lmao

@samkelly6064 6 жыл бұрын

um no sorbet is like ice cream...

@shangsi 4 жыл бұрын

My brain almost suffocated by ur speech speed. Someone give him a speeding ticket lol

@Crystalvampire66 10 жыл бұрын

Extra thumbs up for Thought Bubble John and Sara(or possibly Sarah)

@Collsy100 10 жыл бұрын

Baby Alice animation! My heart!

@VirtuallyKesi 8 жыл бұрын

Is it weird that I watch these for fun?

@moonflower813 8 жыл бұрын

Not at all. I do it too. It's fascinating stuff.

@callumburke5018 8 жыл бұрын

+sunburst223 Agreed

@samkelly6064 6 жыл бұрын

wanting to learn is not weird. Everyone should learn more about how their bodies and brains work.

@Foreveralonecuuuh 5 жыл бұрын

Yes.

@spiffykitty01 5 жыл бұрын

2019 AP PSYCH GANG WYA

@user-jv4wr2mf3w 5 жыл бұрын

we right here and we cruing

@river8585 4 жыл бұрын

I’m just a freshman learning for fun :c

@kiloiuu 6 жыл бұрын

I haven't even finished watching this video. But I love this channel. I'm studying Psychology right now in Moçambique, the lessons are very formal and the teachers sound very boring and seem a bit lost sometimes here. The way you give out information about Psychology is wonderful. Makes it so much easier to understand with the examples too and a little humor in the middle makes me like it even more. At the same time, this is 4 years later, but I hope that you keep adding new things for us to keep learning

@matthewdrummond1340 7 жыл бұрын

I'm currently watching this in October 2016. Has me looking at the clowns a whole other light.

@Krazycutiegurlxxx 7 жыл бұрын

I love the creepy music they added in. It just sounds off-putting.

@aerialwhen9559 4 жыл бұрын

AP Psych 2020! Good luck everyone!

@meganlynncoombs 9 жыл бұрын

Just wanted to let you guys no you never fail to make me happy :) Used your videos throughout high school and they were sooo helpful!! I was so glad when i realized that you also have videos that are now helping me in university. you guys rock!!

@Gailsla10 5 жыл бұрын

So interesting! Growing up, I've always had issues recognizing smells from specific sources, even though i could still smell. Whenever I tried explaining this issue, people thought there was an issue with my sensing, because i didn't have the vocabulary to explain it's actually my perception!

@IsiTurner 9 жыл бұрын

I love how the parents were John and Sarah, with Henry and Alice!

@AnshuSingh-tg6kx 4 жыл бұрын

Hiii Isobel Turner

@sleuthed Жыл бұрын

I also have prosopagnosia. I have trained myself to be able to recognize some people sometimes, context helps, by looking for specific facial features, but it's not an automatic thing like it seems to be for most people. I also had to force myself to look at people's faces, which as a kid (autistic) I tended to... not do. Possibly related. I have walked right past my mom in public without registering it was her before. As a kid going grocery shopping with her I had to remember what she was wearing so I could find her again. Sometimes I forget that's not normal.

@TheGuyNamedAnon 10 жыл бұрын

Hank and a Corgi, two of my favorite things, in a video together. You don't understand how happy this made me.

@TheGuyNamedAnon 10 жыл бұрын

I should also mention I'm a psych major, so it's pretty much the best video on youtube for me.

@strawberryiesful 8 жыл бұрын

Using all your Psychology videos to help me study for my AP test in the beginning of May. Extremely helpful.

@jessewolf2872 8 жыл бұрын

+strawberryiesful Same

@bloodsolder01 8 жыл бұрын

+strawberryiesful im dead

@nailajoyce6751 8 жыл бұрын

Same here!

@strawberryiesful 8 жыл бұрын

Lol it's alright

@giablum5384 6 жыл бұрын

did you pass???

@Viroquet 10 жыл бұрын

this has become my favorite crash course subject. I cant believe ive forgotten how much i love psychology.

@JamieHung5201314 8 жыл бұрын

Psych test tomorrow and this information just zoomed past me @_@

@itsmehstrawberry 10 жыл бұрын

Do more videos with the Corgi! She was adorable!

@mghinto 10 жыл бұрын

Great episode guys! I have a few questions: Is facial recognition limited to human faces? Can the doctor recognize the faces of different animals for example? Or do they fall under the 'object recognition' category?

@mesinajohncarlo9281 4 жыл бұрын

BS Psychology students! Good luck on your exams!!! I'm rooting for all of you!!!😍😭

@charliea3812 5 жыл бұрын

Good luck on the exam today!

@oyleinharrison2697 9 жыл бұрын

Thank you for this video! I am in first year university, and yet this video summarized our whole chapter on sensation and perception. Very concise, very informative.

@patrickgen 5 жыл бұрын

Great series! You're talking about all the things I'm learning in my psychology class, it's a nice review!

@thenekom 10 жыл бұрын

Any video that starts out with "Let me tell you about Oliver Sacks" is bound to be awesome. Fascinating man to be sure.

@jaynejacobs3160 6 жыл бұрын

Wow! Thank you so much! I've been unsuccessfully trying to decipher the chapter on vision in my textbook for an online class in sensation and perception. This 10-minute video cleared up a great deal of what I wasn't understanding.

@shrutimarlecha1552 8 күн бұрын

I've taken up an online course on Introduction to Psychology, and Crash Course Psychology was one of the supporting materials for the modules. Now, it is way past midnight and I have been binge watching the entire series but I should be sleeping but then this is so well done and interestingly presented! I have even managed to take some notes for my own research and study. Thank you for your stellar work! 🙂

@littlemachiavelli 9 жыл бұрын

Bless these videos, without them I would be failing AP Psych.

@joseargerami5257 9 жыл бұрын

Amen

@samanthaclaire3114 10 жыл бұрын

awww it's john, sarah, henry and their new baby at 3:05!!

@chels5174 8 жыл бұрын

I love how Hank says "Now if you were paying attention"

@destinydempsey9245 Жыл бұрын

I learned more from this video than I did the whole 2 chapters I read about perception vs sensation in my Psychology textbook. Thank you.

@Umbra-Psi 9 жыл бұрын

Whoa there Hank.. If you want me to pay attention you need to put down that corgi. But since it's already here for he love of god please show more of that corgi. CORGI!

@jamesphelps3409 5 жыл бұрын

Ap test tomorrow!!

@robertadevine4239 4 жыл бұрын

THANK YOU SOOOOO MUCH. Crash Course has been my tutor for my whole Psychology Program for my Bachelors Degree. I love your videos!! When I afford it, I will contribute, for sure! Thank you .

@jamesrobinson949 10 жыл бұрын

To second one of the previous comments, I really do appreciate the trouble you guys go through to make these videos they are some of the best on KZfaq.

@BeatlesBiitch 10 жыл бұрын

The new parents were TOTALLY John and the Yeti!!

@TripsStarlake 10 жыл бұрын

I'm so grateful for Crash Course Psychology, I am in Psychology 100 and we are on the same track as your videos...so, they're very helpful!

@Child-of-Astara 8 жыл бұрын

Oh my goodness...please, please, PLEASE continue to make studying this AMAZING.

@monkeypoohonyou 10 жыл бұрын

This is my favorite crash course series so far!!

@NumanKhan-tm2co 8 жыл бұрын

the stuff that you delivered is quite informative but the speed that u have is like setting on rocket or a bunch of dogs is chasing you 😂😂

@horseenthusiast1250 8 жыл бұрын

*sitting

@biancageraldinee 8 жыл бұрын

use the caption

@expandingdome6250 6 жыл бұрын

Really trains your speed hearing, eh ?

@nishatanaira857 6 жыл бұрын

true...

@bobdole877 6 жыл бұрын

I usually put it on 1.5 or 2x speed to watch the video faster

@Nimodog19 8 жыл бұрын

Anyone here for the Psych Exam: Wanna get a study group goin?

@raulmayers2072 8 жыл бұрын

+Nimo Dhar I want a 5 so badly. Lol.

@ifonlycainwereabel2110 5 жыл бұрын

How did yall do

@itsnarroblox 5 жыл бұрын

We could go on a website

@theonlychickensama8353 5 жыл бұрын

Lmao same here

@DakuMeisterSA 5 жыл бұрын

yeah sure

@catmc7616 7 жыл бұрын

I'm studying Anatomy and I watch all you videos. They are very helpful and fun. I have two corgis and I love when your corgi shows up in the videos!!

@ryangaskin586 8 жыл бұрын

Finding out you're colourblind on a youtube video...

@PsyX99 8 жыл бұрын

+Ryan Gaskin Welcome to the colorblind club. We have cookies :D

@scottn.6088 8 жыл бұрын

+Ryan Gaskin In many ways it's still better than being stereo-blind. Just wait for Augmented reality glasses, someone will make an app for colour-blindness (using textures) they can't really do that for stereo-blindness.

@bananasinricecrispys1142 8 жыл бұрын

I MAY BE COLORBLIND!!!!!! YA!!!!!!! wait... that's not necessarily a good thing how's my fellow bros in the color blind club

@PsyX99 8 жыл бұрын

Hunter Harris I'm fine, you ? x)

@bananasinricecrispys1142 8 жыл бұрын

+PsyX99 Good thanks for asking, the last day of high school is tomorrow

@annikadaniels-matthews4158 6 жыл бұрын

seeing the corgi made my day so much better

@tallbeauty 9 жыл бұрын

I totally love this series. These have really helped me this semester with my Cognitive Psychology class. I hate school!

@theamazingfuzzlord 10 жыл бұрын

This episode was 10% Psychology, 90% Corgie ^_^

@tanishqas3966 7 жыл бұрын

I love the way you speak Hank! I understand everything so well!

@chindenach 10 жыл бұрын

Your show is simply awesome and my AP psychology class thanks you for the quick review!

@OMG1877 8 жыл бұрын

Seriously love watching crash course psych. It's a nice way to spend my 20 min breaks in between studying for the MCAT. Thanks Hank

@chels5174 8 жыл бұрын

The key to happiness is watching Hank playing with a corgi

@mariapialucia7304 7 жыл бұрын

it should count so many more views I adore this channel so much, it should get more recognization

@MrMcalec 8 жыл бұрын

CrashCourse has helped me in just about every one of my courses, thank you guys!

@jaidentufts717 8 жыл бұрын

am I the only one watching because I want to, not for class?

@soslothful 8 жыл бұрын

No. I watch them for continuing self education. Crash Course, SciShow, TED and others.

@lrc6217 7 жыл бұрын

No you're not

@soslothful 7 жыл бұрын

Meetin It is very encouraging to see a young person enthusiastic for learning.

@lailac3077 7 жыл бұрын

meeee

@smiley235 7 жыл бұрын

No many more do I'm sure. I'm 30 and work full time in a completely different field, but I love this stuff.

@carolannwedding5611 3 ай бұрын

Anyone watching this for fun??? Just me? Okay...

@RockyAnnmarie 7 жыл бұрын

Watching this as a review for a cognitive psychology test on sensation and perception. I haven't watched you guys since Ap psych in high school like 3 years ago. I love you guys your videos helped me so much and still do. I love you HANK

@NandhiniLakuduva 10 жыл бұрын

I've always watched the history crash courses with John, so its nice to finally check out a science crash course and meet you Hank! :D

@NatoCaloGaming 10 жыл бұрын

DOOOOOGGGEEEE!

@P9E8wcbpN6Q 10 жыл бұрын

doge is not corgi doge is shiba inu

@CascataAriana 10 жыл бұрын

***** All are doge. Much bark.

@hewlettsdaughter 10 жыл бұрын

***** Doge is definitely corgi.

@P9E8wcbpN6Q 10 жыл бұрын

hewlettsdaughter very no much no look it up, doge is shibe

@NatoCaloGaming 10 жыл бұрын

DOGE!!!

@errr404_4 7 жыл бұрын

I don't usually comment in youtube, but when i do,

@errr404_4 7 жыл бұрын

i do it twice.

@Krazycutiegurlxxx 7 жыл бұрын

The most interesting youtube person on youtube. ~classy music plays~

@PogieJoe 10 жыл бұрын

The dog was great and Hank's reaction to it was even better. :) I'm really enjoying this series!

@laurawic 8 жыл бұрын

Nice way to keep audience attention! also thanks so much for the accurate captions!!!

@ericvilas 10 жыл бұрын

Aww, Hank, why??? It's so hard for me to focus when all I'm thinking about is hugging and kissing that Corgi :(

@goldtgreentwirler 10 жыл бұрын

because according to the laws of KZfaq, Hank will get more hits and new subscribers if there is a cute furry animal in the description and picture.

@dwightbarrett6912 8 жыл бұрын

psychology test tomorrow i hope watching all these videos and reading the intro to psychology book helps...

@princessvlog2699 8 жыл бұрын

How'd it go?

@dwightbarrett6912 8 жыл бұрын

Not too bad I passed the course with a B+ 😎😎 Are you doing psychology?

@bree4776 8 жыл бұрын

Ugh Hank+Corgi equals cuteness overload!!!! ❤❤❤❤

@MultiSciGeek 7 жыл бұрын

One of the most interesting and diverse courses I've seen.