The biggest chemical cover up in history. PFAS has polluted the entire global water system. Now, potentially dangerous forever chemicals are being found in the entire US population. Go to https://groundnews.com/Ve to get all sides of every story. Subscribe to save 40% off the unlimited Vantage Plan through our link.

If you’re looking for a molecular modelling kit, try Snatoms, a kit I invented where the atoms snap together magnetically - https://ve42.co/SnatomsV

Sign up to the Veritasium newsletter for weekly science updates - https://ve42.co/Newsletter

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0:00 Killed by Fridges
5:27 Teflon and The Manhattan Project
7:59 Teflon is Tricky
11:37 The Teflon Revolution
13:27 Earl Tennant's Farm
17:34 Inside DuPont
20:28 Fluoride In Drinking Water
25:00 It's bigger than that
29:23 What is PFAS?
35:56 How much PFAS is in Derek’s blood?
37:56 How forever chemicals get into your blood
46:18 Removing PFAS from drinking water
49:30 Can you lower your PFAS levels?

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A huge thank you to Rob Bilott for his time and expertise. Check out his fantastic book: Bilott, R. (2019). Exposure. Simon and Schuster - https://ve42.co/7R

Rob's story also inspired the 2019 film: Dark Waters.

Thank you to Doctor Mike for giving us a medical perspective on PFAS! Check him out at @DoctorMike

Thank you to Henrik Haggeman and the Puraffinity team, as well as Andrew Patterson and Eurofins, for doing the PFAS testing.

Thank you to Leslie Hamilton, Johns Hopkins APL, Alex Conrad, Imperial College London, Jana Avgustini, and Matija Krvavica for their help on the project.

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PFAS Tools:
PFAS Blood Test - https://ve42.co/PFASTest
What's My Exposure? via www-pfas.pfas-exchange.org - https://ve42.co/myexposure
Serum PFAS Calculator via ics.uci.edu - https://ve42.co/pfascalculator
Interactive Map: PFAS Contamination Crisis via www.ewg.org - https://ve42.co/pfasmapinteractive
The Map of Forever Pollution via foreverpollution.eu - https://ve42.co/foreverpollutionmap
Australian PFAS Chemicals Map via pfas.australianmap.net - https://ve42.co/australianpfasmap

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References:

References can be found here - https://ve42.co/PFASReferences

Images & Video:

Image and video references can be found here - https://ve42.co/PFASVisuals

3D Models:

"Low Poly Base Mesh-530 Tri" (https://skfb.ly/onsxE) by Huge_Man
"Blood Vessel" (https://skfb.ly/owHJX) by IMU University
“Generic Factory” (https://skfb.ly/onQpR) by assetfactory
"Lowpoly People + Waldo" (https://skfb.ly/6zqCE) by Loïc Norgeot
PFOA Molecule via PubChem - https://pubchem.ncbi.nlm.nih.g....ov/compound/Perfluor

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Music from Epidemic Sound

Students learn about the concept of pushing, as well as the relationship between force and mass. Students practice measurement skills using pan scales and rulers to make predictions about mass and distance. A LEGO® MINDSTORMS® robot is used to test their hypotheses. By the end of the activity, students have a better understanding of robotics, mass and friction and the concept of predicting.

View the full activity on TeachEngineering:
https://www.teachengineering.o....rg/activities/view/n

TeachEngineering has over 1,500 FREE lessons and activities. Visit https://www.teachengineering.org/ for more

Music: Dream of a Day

Students further their understanding of the salmon life cycle and the human structures and actions that aid in the migration of fish around hydroelectric dams by playing an animated PowerPoint game involving a fish that must climb a fish ladder to get over a dam. They first brainstorm their own ideas, and then learn about existing ways engineers have made dams "friendlier" to migrating fish, before being quizzed as part of the game.
This engineering curriculum aligns to Next Generation Science Standards (NGSS).

View the full activity on TeachEngineering:
https://www.teachengineering.o....rg/activities/view/c

TeachEngineering has over 1,500 FREE lessons and activities. Visit https://www.teachengineering.org/ for more

Music: Campfire Song

Pre-order our book YOU ARE AN ARTIST (which includes new assignments!) here: http://bit.ly/2kplj2h

This week we visit Lenka Clayton, another Pittsburgh based artist whose work finds meaning in ordinary, everyday objects. For her assignment, she asks you to partner with someone and recreate a lost childhood object, using their memory of the object and the materials you have around you.

INSTRUCTIONS - Lost Childhood Object
1. Ask someone to describe an object they made or cherished as a child. Make a mental image of that object
2. Create the object
3. Give the object back to the person (Ideally, you'd do this project in tandem)
4. Document and upload using #theartassignment
5. Fame and glory (your work might be in a future episode)

Sarah then connects this assignment to contemporary artist Roman Ondak.

Find out more about The Art Assignment and how to submit your response: http://theartassignment.com/

Students learn the basics of the electromagnetic spectrum and how various types of electromagnetic waves are related in terms of wavelength and energy. In addition, they are introduced to the various types of waves that make up the electromagnetic spectrum including, radio waves, ultraviolet waves, visible light and infrared waves. These topics help inform students before they turn to designing solutions to an overarching engineering challenge question.

View the full lesson on TeachEngineering:
https://www.teachengineering.o....rg/lessons/view/clem

TeachEngineering has over 1,500 FREE lessons and activities. Visit https://www.teachengineering.org/ for more

In a year of unprecedented teacher activism, Jahana Hayes, the 2016 National Teacher of the Year, decided to make a run for the U.S. House of Representatives—and won. In an exclusive interview with Education Week, Hayes discusses her journey from Connecticut classroom to Washington and her priorities as a new lawmaker.

TeachEngineering describes how water is essential to all living organisms, and goes into detail how engineers study, innovate and create new ways to provide clean water, preserve our ecosystem and keep our crops nourished around the world.

Music: 8 Bit Dreamscape

How can you turn percentages into fractions?
Let's talk about how you can figure questions like this out in this new #LearnwithLyqa #MathMondays video.

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You can click here to see the other videos I made:
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Happy learning!

This tutorial shows how to find the inverse of a number when dealing with a modulus. When dealing with modular arithmetic, numbers can only be represented as integers ranging from 0 to ( the modulus minus 1 ). This tutorial shows one method that can be used when solving for an inverse of modular arithmetic.

Join this channel to get access to perks:
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Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

What are you waiting for? Hello friends, I am the Earth, your planet and I want to talk to you about the ground, which is really important and yet we rarely take it into consideration.

The ground which you walk on everyday is my most superficial part, it´s where your houses are built on, your schools and also the roads on which you travel. It´s where rivers run along, plants grow on and animals live on.

How do you think the ground was made? Well it was a very long process, taking millions of years, and is still continuing, in which some really strong workers who never get tired are involved: the sun, the wind, the water and living things. Rocks which at the beginning made up my surface, bit by bit began to crack breaking into smaller pieces because of the strength of those workers. This mixture of different minerals grew richer with organic matter coming from plants and dead animals. It takes a hundred years to obtain just one centimeter of soil. The result of all this process gives us a surface where life can live, full of wonderful creatures.
We must look after our ground just as we are maintaining our air clean as well as our water because it´s imperative for living things for them to be able to eat as well as to have a place to live. And there are so many dangers which, in a very short time, can transform fertile land into a desert where it is impossible for life to thrive.

Forest fires as well as cutting down large amounts of trees are examples of how the soil is left defenseless. Without the help of the roots from trees and plants in the ground, rain water and wind wipe away the nutrients in the soil. This is called erosion. And when this occurs, nothing will be able to grow there again. The same thing happens when toxic products are thrown on the ground killing living things and contaminating the water that flows underground making the land sterile.

Without healthy soil it is impossible to have a healthy life, so we must look after it all together. The ground you walk on is the ground which allows you to live. It is for this reason that we must help maintain it clean and respecting it by never throwing rubbish on it.

If we keep it clean, I the Earth, your house in the universe and all living things which live on me, will all be a lot happier.

Because as you know…children can make a world of difference.

Check out some of our favorite shop products here: https://kgs.link/shop Our shop is not only our most important source of income, but our passion project where we create sciencey products with of lot of love and detail.

Sources & further reading: https://sites.google.com/view/....sources-interstellar

Could aliens destroy us from light years away? Another day at Kurzgesagt Labs, where we answer the most important questions with science.
Today: how might civilizations wage war across light years? What kind of devastating weapons could they use and what would they look like?

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Spelling and Reading Lesson - Live Compilation

Reading booklets are available at Shopee
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What is a Democracy? In this video we explore the many characteristics of a democracy including Elections, Majority Rule, Term Limits, Citizens and more. We also discuss the different types of democracies namely: Direct Democracy and Representative Democracy and discuss the differences of each.

We hope you enjoy! If you're looking for more teaching resources about democracy, download our free 11-page lesson plan here: https://learnbright.org/lesson....s/social-studies/wha

Thank you for watching and learning with us! We’re constantly releasing new content and videos so click that “Subscribe” button and you’ll notified.

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*Teachers and Parents! Did you know? In addition to these great videos, we have also created a library of high quality and engaging lessons for your elementary aged student(s). Visit us, sign up for a free account, and instantly you'll have access to thousands of lesson plans, learning materials, teaching instructions, activities, and assignments that your kids will really enjoy! We hope to see you soon!

Browse our entire collection of Social Studies lesson plans: https://learnbright.org/lessons/?filter_subject=social-studies

#WhatIsDemocracyForKids
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Español para los negocios. Nivel intermedio - avanzado

Muchos de nuestros alumnos de español tienen que aprender el idioma por motivos laborales. Nos habéis pedido muchas veces en los comentarios que veamos "español para trabajar" o "español para los negocios".

En esta nueva clase veremos la primera reunión entre la empresa "El Aguila" y su agencia de marketing "Espa-Marketing".

Aprenderemos un montón de vocabulario y expresiones sobre los negocios y las reuniones.


Algunas frases y vocabulario que veremos en el vídeo:

Gerente general
Jefe de producto
CEO de la agencia
Ejecutivo de cuentas
Acompañamiento al cliente
Estrategia de ventas
Conocer al cliente y al producto
Situación actual del producto en el mercado
Principales competidores
Objetivos que se quieren alcanzar
Pendrive
Objetivos para la próxima temporada
Crecimiento del 15%
Presupuesto disponible para publicidad
Nos pondremos manos a la obra
Evaluaremos la información


Por cierto, El "S.L." que suelen llevar las empresas al final, como "El Aguila S.L." refiere a "Sociedad Limitada" y es el tipo de sociedad más extendido en España.


Recuerda suscribirte a nuestro canal para ver más videos: 🔔https://www.youtube.com/Aprend....erespa%C3%B1olonline


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

En nuestro canal encontrarás un curso completo y gratuito de español (español como lengua extranjera) para principiantes y avanzados. Te prepara para el examen español DELE. En los videos aprenderás español a través de imágenes, diálogos, escuchar y hablar español.

The Terrestrial planets are the four closest planets to the sun. The inner planets in order are Mercury, Venus, Earth, and Mars.
They are rocky planets that have few moons, no rings, and craters.
I review the characteristics of the terrestrial planets.

Scale model picture of planets
http://www.lesud.com/lesud-astronomy_pageid81.html

Learn about our solar system.

We hope you are enjoying this video! For more in-depth learning, check out Miacademy.co (https://www.parents.miacademy.co/), an online learning platform with lessons and practice games that go along with our videos. Use coupon code VIDEOSPECIAL for a discount. Good for homeschoolers, Parents, Teachers, or anyone with kids in grades K-8.

Miacademy also offers many hands-on learning activities including a business simulation, writing in the Miacademy weekly, and creating artwork. Teaching social skills is also one of the key values at Miacademy. On the site, kids can interact safely in a moderated environment and share their artwork, videos, and ideas with each other.

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

Why we study differential calculus. Created by Sal Khan.

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivative-intro/ab-derivative-intuition/v/derivative-as-a-concept?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-limits-continuity/ab-limits-opt-vids/v/proving-a-limit-using-epsilon-delta-definition?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago.

About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan AcademyÕs AP Calculus AB channel: https://www.youtube.com/channe....l/UCyoj0ZF4uw8VTFbml
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Have you ever heard of the law of inertia? In this Newton's First Law of Motion video for kids, you will learn about why objects either move or don't move. The first law of motion, or the law of inertia, states that objects at rest will remain at rest unless something else moves that object. It also states that an object that is moving will keep moving until something stops it.

When it comes to an object at rest, think of anything around you that isn't moving. A pillow, a book on the desk, or the desk itself. They will stay unmoved unless you, or something else, moves it. As far as objects that are moving, think of a ball in the air. Eventually the ball will fall because of gravity and air resistance. However, if it were in space, it would keep moving forever at the same speed unless it hits something or something hits it.

Speaking of gravity and air resistance, these are two natural forces that affect an object's motion. Another is friction. If you roll something across a flat but uneven surface, that object will eventually stop because of friction. Say, however, you roll something along a flat and even surface, such as perfectly smooth ice. In this case, the object you roll may not stop for a much longer amount of time because there is much less friction to stop its motion.

We hope you and your student(s) enjoyed learning about Newton's first law of motion! If you want to learn even more, head over to our website and download one of our many free lesson plans about the law of inertia, full of activities, worksheets, and more!

https://learnbright.org/lesson....s/science/newtons-la
https://learnbright.org/lesson....s/science/gravity-st

What you will learn in Newton's First Law of Motion for Kids:
0:00 Introduction to the first law of motion (the law of inertia)
0:41 Explanation for an object at rest
1:20 Explanation for an object in motion
2:43 The effect of friction on objects
3:33 The effect of gravity on objects
4:11 The effect of air resistance on objects

Thank you for watching and learning with us! We’re constantly releasing new content and videos, so click that “Subscribe” button and you’ll get notified.

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*Teachers and Parents! Did you know? In addition to these great videos, we have also created a library of high-quality and engaging lessons for your elementary aged student(s). Visit us, sign up for a free account, and instantly you'll have access to thousands of lesson plans, learning materials, teaching instructions, activities, and assignments that your kids will really enjoy! We hope to see you soon!

Browse our entire collection of Science lesson plans: https://learnbright.org/lessons/?filter_subject=science

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Austria-Hungary. Ottoman empire. British, German, French and Russian empires.

Watch the next lesson: https://www.khanacademy.org/hu....manities/world-histo

Missed the previous lesson? https://www.khanacademy.org/hu....manities/world-histo

World history on Khan Academy: Called the Great War (before World War II came about), World War I was the bloody wake-up call that humanity was entering into a new stage of civilization. Really the defining conflict that took Europe from 19th Century Imperial states that saw heroism in war into a modern shape. Unfortunately, it had to go through World War II as well (that some would argue was due to imbalances created by World War I).

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 World History channel: https://www.youtube.com/channe....l/UC6KRvvmvkCchFMo2E
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MORE MATHS https://www.youtube.com/playli....st?list=PLLF_mZmNqOn

📦📏 Did you know that volume tells us how much space an object takes up? In this educational video for kids, you’ll learn what volume is, how it is measured, and what the cubic meter means as a unit of measurement.

In Primary School, the subject of Mathematics focuses on developing five key senses: the numerical sense, to work with numbers and operations; the measurement sense, to measure and compare magnitudes; the spatial sense, to understand geometric figures and their properties; the algebraic sense, to identify patterns and use symbols; and the stochastic sense, to interpret data and probabilities. Additionally, the socio-affective sense encourages a positive attitude toward mathematics.

📖 SUBJECT PLAYLISTS
🦖⛰️🐅 NATURAL SCIENCES for Primary School: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
👨‍🏫 SOCIAL SCIENCES for Primary School: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
➕✖️ MATH for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🤴🏰 HISTORY for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🌍⛰️ GEOGRAPHY for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🤝😊 Values and Emotions for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn v=KkCIIQyevjo&list=PL_Y3qbepMRoY7gwuwniiq11oMo6Ofe724

🌍 THE HAPPY LEARNING UNIVERSE

✅ Learn more about Happy Learning and our educational platform: https://happylearning.tv/en/

✅ Discover our social mission: https://happylearning.tv/en/nemesio-diez-foundation/

✅ Download the Happy Learning App:
- iOS: https://apps.apple.com/es/app/....happy-learning-tv/id
- Android: https://play.google.com/store/apps/details?id=tv.happylearning.canal&pli=1

🎓 ABOUT HAPPY LEARNING
Happy Learning is a social enterprise created by the Nemesio Diez Foundation, working to improve people's quality of life through education, health, sports and culture.

As a social company, our mission is to educate all children in the world in values and knowledge, to promote their holistic development and their commitment to society and the planet.

We offer educational resources to families, schools, hospitals and NGOs to ensure that children everywhere have access to a high-quality, comprehensive education.

At Happy Learning, we turn learning into an exciting adventure for primary school children. 🚀
We offer over 2,000 educational resources that combine fun and learning through animated videos, reading materials, interactive games and real-world activities.

📺 HAPPY LEARNING YOUTUBE CHANNEL

Welcome to Happy Learning! 🚀📚
The educational channel where learning is an adventure. Our goal is to spark curiosity and a love for knowledge in primary school children through fun and dynamic educational videos.

Discover the fascinating world of science with videos on Dinosaurs, the Solar System, Invertebrate Animals, Arachnids and much more. Travel back in time with history videos covering Prehistory, the Discovery of America or Ancient Egypt. Learn geography with content about The Earth and Its Movements, the Water Cycle and Parts of the Earth. Strengthen math skills with videos on Multiplication, Subtraction and Matter and Its Properties, and improve Spanish language understanding with lessons on Nouns, Sentences and Subject and Predicate.

Happy Learning transforms education into an exciting experience through animated videos, clear explanations and interactive activities. Perfect for children, parents and teachers seeking high-quality educational content.
🌟 Join our community of explorers!