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A dose of reality about vaccines…
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↓ More info and sources below ↓

As more and more parents are choosing not to vaccinate their children or are vaccinating them later, diseases like measles are making a comeback. What's behind this antivax movement? Are vaccines safe? How do vaccines work? Why do some people claim there is a link between vaccines and autism? This week we look at why are people afraid of something that has saved so many lives, and the history and science of vaccines. #vaccine #antivax #measles


REFERENCES AND FURTHER READING:

"The Panic Virus" by Seth Mnookin: http://amzn.to/1CB8Q7p
"On Immunity" by Eula Biss: http://amzn.to/1FTmmH1

Watch "Vaccines: Calling the Shots" from PBS' NOVA: https://www.youtube.com/watch?v=NVCO6_bpsEY

The Robert Falcon Scott expedition and the lost cure for scurvy, by Maciej Cegłowski: http://idlewords.com/2010/03/scott_and_scurvy.htm

The incredible value of vaccines: http://www.gavi.org/about/miss....ion/facts-and-figure

The Guardian's herd immunity simulation: http://www.theguardian.com/soc....iety/ng-interactive/

Map of global vaccine rates: http://gamapserver.who.int/gho..../interactive_charts/

How risky are vaccine side effects? http://www.cdc.gov/vaccines/va....c-gen/side-effects.h

Eula Biss on vaccines and empathy: http://www.vox.com/2015/2/6/79....92071/how-one-vaccin


Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
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It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.DFollow me on Twitter: @jtotheizzoe
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Produced for PBS Digital Studios

Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics
Katie Graham - Director of Photography
John Knudsen - Gaffer
Dalton Allen - Post-Production Intern

Theme music:
"Ouroboros" by Kevin MacLeod

Other music via APM

Stock images from Shutterstock

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Last week's video:
What is Déjà Vu? https://www.youtube.com/watch?v=ut8mYGi0YRs

More videos:
Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMUpcxPSA
Why Did We Blow on NES Games? https://www.youtube.com/watch?v=4Gf9mtXnJfM
The Science of Game of Thrones - https://www.youtube.com/watch?v=Utu-LpJn3Is
There Was No First Human - https://www.youtube.com/watch?v=xdWLhXi24Mo health (industry) mmr polio

In this video, I show you almost everything there is to know about fractions. In order to do well on the Armed Services Vocational Aptitude Battery (ASVAB) as well as other standardized tests, you must be comfortable solving problems that are similar to the ones in this video.

0:00 Introduction
2:10 Reducing Fractions
4:35 Adding and Subtracting Fractions
11:05 Multiplying and Dividing Fractions
15:38 Improper Fractions and Mixed Numbers
23:25 Converting Fractions to Decimals
28:06 Outro

Affiliate Test Prep Resources
ASVAB AFQT For Dummies
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#GrammarHero #Fractions #Math #ASVAB #PiCAT #AFQT #AceTheASVAB #ASVABVersion

This biochemistry video tutorial explains how to memorize the 20 amino acids - the easy way.

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Here is a list of topics:
1. Nonpolar Amino Acids - Glycine, Alanine, Valine, Leucine and Isoleucine
2. Polar Amino Acids - Serine, Threonine, Asparagine, and Glutamine
3. Acidic Amino Acids - Aspartate and Glutamate
4. Basic Amino Acids - Lysine, Arginine, and Histidine
5. Aromatic Amino Acids - Phenylalanine, Tyrosine, and Tryptophan
6. Heterocyclic Amino Acids - Proline
7. Electrically Charged Amino Acids

Disclaimer: Some of the links associated with this video may generate affiliate commissions on my behalf. As an amazon associate, I earn from qualifying purchases that you may make through such affiliate links.

In this video your child will be able to learn about 5 places around the world and 5 different time periods. First, your child will be taken on a trip around the world and visit amazing cities such as Paris, New York, Murcia, Mexico and Sydney. A few things they will be able to learn include popular landmarks of the city, traditional foods and more. Next, your child will be able to travel back in time to the prehistoric era, egyptian, renaissance, industrial revolution, digital revolution and to present day. Your child will meet famous people such as Cleopatra and Steve Jobs!

This video is part of a collection of videos that teaches children about history. During these videos you will learn plenty of things such as notable people who lived in these eras and why this history is important.

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Today we’ll cover the fourth and final of our core disciplines of engineering: chemical engineering. We’ll talk about its history and evolution going from soda ash competitions to oil refineries and renewable energies. We’ll also discuss some newer and emerging fields like biotechnology and pharmaceuticals.

Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playli....st?list=PL1mtdjDVOoO

***

RESOURCES:
http://www.chemistryexplained.....com/Kr-Ma/Leblanc-Ni
https://www.keionline.org/book/prizes-lots-of-them
https://www.sciencehistory.org..../historical-profile/
http://www.world-petroleum.org..../edu/223-how-is-crud
https://www.thoughtco.com/hist....ory-of-gasoline-1991
https://www.britannica.com/tec....hnology/cracking-che
https://www.britannica.com/tec....hnology/petroleum-re
https://www.britannica.com/tec....hnology/chemical-eng
https://www.allaboutcareers.co....m/careers/career-pat
https://www.myklassroom.com/En....gineering-branches/2
https://www.impossiblefoods.com/burger/
https://www.eia.gov/energyexpl....ained/?page=biomass_
“Basic Principles and Calculations in Chemical Engineering” by David Mautner Himmelblau, James B. Riggs

***

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark Brouwer, Glenn Elliott, Justin Zingsheim, Jessica Wode, Eric Prestemon, Kathrin Benoit, Tom Trval, Jason Saslow, Nathan Taylor, Divonne Holmes à Court, Brian Thomas Gossett, Khaled El Shalakany, Indika Siriwardena, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, Evren Türkmenoğlu, D.A. Noe, Shawn Arnold, Ruth Perez, Malcolm Callis, Ken Penttinen, Advait Shinde, Cody Carpenter, Annamaria Herrera, William McGraw, Bader AlGhamdi, Vaso, Melissa Briski, Joey Quek, Andrei Krishkevich, Rachel Bright, Alex S, Mayumi Maeda, Kathy & Tim Philip, Montather, Jirat, Eric Kitchen, Moritz Schmidt, Ian Dundore, Chris Peters, Sandra Aft
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Months after Platero's passing, the boy and his friends visit Platero's grave. Surrounded by flowers and under the shade of a tree, the child remembers his dear friend with affection and sadness. A colorful butterfly appears, like a message from Platero, assuring them that he will always be with them.

www.smileandlearn.com

This geometry video tutorial provides a basic introduction into two column proofs with parallelograms. It explains the different ways of proving parallelograms. Here are five ways: 1. opposite sides must be parallel. 2. Opposite sides must be congruent. 3. opposite angles must be congruent. 4. 1 opposite side may be both parallel and congruent. 5. Diagonals must be perpendicular bisectors of each other. This video contains plenty of examples and practice problems. Here is a list of theorems used in these two column proofs: reflexive property, vertical angle theorem, definition of a parallelogram, definition of a midpoint, definition of a segment bisector, addition property of equality, substitution property of equality, definition of congruent segments, segment addition, SAS postulate, ASA postulate, and CPCTC.

Polygons: https://www.youtube.com/watch?v=E_-3ulbtcLk

Angles of Regular Polygons:
https://www.youtube.com/watch?v=OEzEo4XqzJQ

Quadrilaterals:
https://www.youtube.com/watch?v=ogcH3eM5beM

Parallelograms:
https://www.youtube.com/watch?v=t42sLuns4Qs

Rectangles - Special Quadrilaterals:
https://www.youtube.com/watch?v=Ov4aTty67A8

Isosceles Trapezoids:
https://www.youtube.com/watch?v=AlyWS8bG3kE

_________________________________
The Rhombus:
https://www.youtube.com/watch?v=uXo_Vpctmrg

Kites:
https://www.youtube.com/watch?v=UTgF6lSAMa8

Proving a Quadrilateral Is a Kite:
https://www.youtube.com/watch?v=dh8vRzTNVBg

Proving a Quadrilateral Is a Rhombus:
https://www.youtube.com/watch?v=EtoP5G98sok

__________________________________
Proving Isosceles Trapezoids:
https://www.youtube.com/watch?v=EvTHRcNBAc8

2 Column Proofs - Quadrilateral:
https://www.youtube.com/watch?v=m8BlpR7xhiM

Skew Lines:
https://www.youtube.com/watch?v=cemF45vNOhg

Points, Lines, Planes, & Segments:
https://www.youtube.com/watch?v=dDWjhRfBsKM

_______________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio

This week on Crash Course Econ, Jacob and Adriene are talking about failure. Specifically, we're talking about market failures. When markets don't provide a good or service efficiently, that's a market failure. When markets fail, often governments step in to provide those services. Stuff like public education or military protection are good examples of market failures. So, what are some of the ways governments address, market failures? Well, it's funny you should ask, as we also talk about that in this episode. We'll get into taxes and subsidies and externalities and a bunch of other important stuff this week on Crash Course Econ.

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book "The Columbian Exchange" by Alfred Crosby, Jr. After Columbus "discovered" the Americas, European conquerors, traders, and settlers brought all manner of changes to the formerly isolated continents. Disease and invasive plant and animal species remade the New World, usually in negative ways. While native people, plants, and animals were being displaced in the Americas, the rest of the world was benefitting from American imports, especially foods like maize, tomatoes, potatoes, pineapple, blueberries, sweet potatoes, and manioc. Was the Columbian Exchange a net positive? It's debatable. So debate.

The Columbian Exchange, by Alfred Crosby, Jr: https://bit.ly/3M3ZtbG

Chapters:
Introduction: The Columbian Exchange 00:00
Diseases of the Columbian Exchange 1:14
John Green Does the Cinnamon Challenge (Ew) 4:21
An Open Letter to Tobacco 5:09
Animals of the Columbian Exchange 5:51
Plants of the Columbian Exchange 7:27
People of the Columbian Exchange 9:53
Credits 11:36

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

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For many of us in the modern world, a conveniently located toilet that efficiently and safely removes our bodily waste is a luxury that we take for granted. If we were to step back in time, to approximately 2000 years ago, we would see that life for the ancient Romans was not always quite so easy.

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)

Narrator:

Chris Kane
https://vocalforge.com/

Sources:

Hobson, B., 2009. Latrinae et foricae: toilets in the Roman world. London: Duckworth.

Jansen, G.C., 2003. Social distinctions and issues of privacy in the toilets of Hadrian's Villa. Journal of Roman Archaeology, 16, pp.137-152.


Koloski-Ostrow, A.. 2015. The Archaeology of Sanitation in Roman Italy: Toilets, Sewers, and Water Systems. The University of North Carolina Press

Magness, J. 2012. What’s the Poop On Ancient Toilets and Toilet Habits? Near Eastern Archaeology,75(2), 80-87. doi:10.5615/neareastarch.75.2.0080

Mitchell. D, Piers. Sanitation, Latrines and Intestinal Parasites in Past Populations

Ancient Rome: Facts and Fictions, Monica M. Bontty · 2020

🚀 Become an AI Master – All-in-one AI Video Learning https://aimaster.me/pro
Learn more about Magic Patterns here: https://magicpatterns.1stcollab.com/iamaimaster_3

In this video I ditch the press-release fluff and put Google’s brand-new Veo 3 through its paces, showing you exactly how to turn nothing but text prompts into crisp 8-second clips with native sound. You’ll watch me bounce between Gemini and the pro-grade Flow interface, learn my Prompt-Director Formula for nailing subject, action, context, motion, style, framing & audio, and see three crowd-pleasing demos in action. I’ll also flag the sneaky differences between Veo 3 Fast and full Veo 3 Quality, share quick wins like borrowing Midjourney stills for style reference, and spotlight.

Chapters:
0:00 – Why Veo 3 matters
0:41 Flow vs Gemini
2:11 Example #1
4:23 The VEO3 Prompt Formula
11:25 Example #2
15:26 Example #3
17:38 Wrapping up

En este nuevo vídeo para aprender español aprenderás 8 formas de decir "ok" en español. 🔔

A través de diálogos prácticos y situaciones de la vida cotidiana, aprenderás ocho formas comunes de expresar acuerdo y aceptación en español y cómo utilizar estas expresiones de manera adecuada.

Descubre cómo decir "está bien", "de acuerdo", "vale" y más mientras mejoras tu fluidez en español. No te pierdas esta oportunidad de expandir tu vocabulario y comunicarte con confianza.


0:00 8 formas comunes de expresar acuerdo
0:17 Está bien
1:14 De acuerdo
2:10 Vale
3:03 Entendido
4:01 Claro
4:52 Ya
6:02 Lógico
7:12 Ok
8:08 Resumen
8:34 Suscríbete y fin del vídeo


Suscribirse:https://www.youtube.com/Aprend....erespañolonline?sub_ 🔔

✅ Curso de español para principiantes: https://youtube.com/playlist?l....ist=PLyhXDeW_WjhBv8b
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✅ Verbos en español: https://youtube.com/playlist?l....ist=PLyhXDeW_WjhDyOv

¡Prepárate para un emocionante viaje de lectura con nosotros en Khan Academy Kids! Estamos emocionados de lanzar nuestra nueva serie de videos, Hora del Cuento. Juntos, nos sumergiremos en libros cautivadores, comenzando con "El Primer Día de Clases", un encantador relato sobre el primer día de escuela de Flamenco.

Si nuestra historia te ha llenado de alegría, demuéstranos tu apoyo con un pulgar hacia arriba y compártelo con tus amigos. No olvides suscribirte a nuestro canal para más cuentos fascinantes. ¡Gracias por formar parte de nuestra vibrante comunidad!

Puedes encontrar "Comenzar la Escuela" y cientos de otros libros en la aplicación gratuita de Khan Academy Kids. Está disponible en Google Play, Apple y las tiendas de aplicaciones de Amazon.

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Practice Your Spanish With Chateo - a Spanish-speaking chatbot! | Get a discount off your first 6 months with code CHATEOBOT | Sign up at: https://www.senorjordan.com/chat
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Hola. In this lesson we'll be using the words Algo and Nada in Spanish.

Don't forget to check out some of my other videos in this series to practice them!

¡Gracias por mirar!

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra2/x2ec2f6f

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra2/polynomial_and_rational/polynomial-remainder-theorem-tutorial/e/remainder-theorem-of-polynomials?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Watch the next lesson: https://www.khanacademy.org/math/algebra2/polynomial_and_rational/polynomial-remainder-theorem-tutorial/v/polynomial-remainder-theorem-example?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Missed the previous lesson?
https://www.khanacademy.org/math/algebra2/polynomial_and_rational/synthetic-division/v/why-synthetic-division-works?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

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Find two numbers whose products is -16 and the sum of whose squares is a minimum.

Practice this yourself on Khan Academy right now: https://www.khanacademy.org/e/optimization?utm_source=YTdescription&utm_medium=YTdescription&utm_campaign=YTdescription

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/ap-statistics/den

Discussion of how "normal" a distribution might be

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/probability/statistics-inferential/normal_distribution/e/empirical_rule?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics

Watch the next lesson: https://www.khanacademy.org/math/probability/statistics-inferential/normal_distribution/v/ck12-org-normal-distribution-problems-empirical-rule?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics

Missed the previous lesson?
https://www.khanacademy.org/math/probability/statistics-inferential/normal_distribution/v/normal-distribution-excel-exercise?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics

Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy’s Probability and Statistics channel:
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Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/sc....ience/physics/torque

The cross product and the direction of torque. Created by Sal Khan.

Watch the next lesson: https://www.khanacademy.org/science/physics/oscillatory-motion/harmonic-motion/v/introduction-to-harmonic-motion?utm_source=YT&utm_medium=Desc&utm_campaign=physics

Missed the previous lesson? https://www.khanacademy.org/science/physics/torque-angular-momentum/torque-tutorial/v/angular-momentum-of-an-extended-object?utm_source=YT&utm_medium=Desc&utm_campaign=physics

Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channe....l/UC0oGarQW2lE5PxhGo
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Ever wonder what goes on behind the K12 competitions? Here’s a peek at the fun, the focus—and the flubs—from Robotics and our National Cook-Off! #K12 #K12Competitions #BTS #StudentCompetitions #OnlineLearning #OnlineStudent #Shorts

In the late 1950s and the early to mid-1960s, a Muslim minister named Malcolm X rose to prominence in the United States during the struggle for Civil Rights. Malcolm X was a member of and spokesperson for the Nation of Islam, and he was a vocal advocate for Black empowerment. His views differed significantly from a lot of the well-known Civil Rights activists of the day, and his views evolved during his ministry. Today, we’ll learn about Malcolm X’s origins, his work with the Nation of Islam, his break from that organization, and his eventual assassination.

Clint's book, How the Word is Passed is available now! https://bookshop.org/books/how....-the-word-is-passed-

VIDEO SOURCES
Peniel E. Joseph, Waiting ’ Til the Midnight Hour: A Narrative History of Black Power in America (New York: Henry Holt, 2006).
Malcolm X, The Autobiography of Malcolm X, With the assistance of Alex Haley (New York: Ballantine, 1992).
Manning Marable, Malcolm X: A Life of Reinvention (New York: Viking Press, 2011).
Ilyasah Shabazz, Growing up X: A Memoir by the Mother of Malcolm X (Penguin, 2003).

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