Inventions that Shaped History

Explore the physics of magnetism, and how its properties are used in modern technologies like MRI machines, hard drives, and more. -- In the 1920s, physicists still had many unanswered questions about magnetism. While they knew that every electron and proton have invisible, magnetic fields that radiate out in closed loops from one end to the other, they wondered: what determines the direction of these magnetic fields? And if every atom is composed of these tiny magnets, why isn’t everything magnetic? Rachel Yang investigates. Lesson by Rachel Yang, directed by Tolga Yıldız, Kozmonot Animation Studio. This video was made possible in collaboration with Nobel Prize Outreach, and with support from the Sloan Foundation Learn more about how TED-Ed partnerships work: http://t.ted.com/Rbx7KCW Visit https://ed.ted.com/nobel-prize to explore more ideas, innovations, and achievements honored by the Nobel Prize Support Our Non-Profit Mission ---------------------------------------------- Sup

Explore the physics of magnetism, and how its properties are used in modern technologies like MRI machines, hard drives, and more. -- In the 1920s, physicists still had many unanswered questions about magnetism. While they knew that every electron and proton have invisible, magnetic fields that radiate out in closed loops from one end to the other, they wondered: what determines the direction of these magnetic fields? And if every atom is composed of these tiny magnets, why isn’t everything magnetic? Rachel Yang investigates. Lesson by Rachel Yang, directed by Tolga Yıldız, Kozmonot Animation Studio. This video was made possible in collaboration with Nobel Prize Outreach, and with support from the Sloan Foundation Learn more about how TED-Ed partnerships work: http://t.ted.com/Rbx7KCW Visit https://ed.ted.com/nobel-prize to explore more ideas, innovations, and achievements honored by the Nobel Prize Support Our Non-Profit Mission ---------------------------------------------- Sup

Explore the physics of magnetism, and how its properties are used in modern technologies like MRI machines, hard drives, and more. -- In the 1920s, physicists still had many unanswered questions about magnetism. While they knew that every electron and proton have invisible, magnetic fields that radiate out in closed loops from one end to the other, they wondered: what determines the direction of these magnetic fields? And if every atom is composed of these tiny magnets, why isn’t everything magnetic? Rachel Yang investigates. Lesson by Rachel Yang, directed by Tolga Yıldız, Kozmonot Animation Studio. This video was made possible in collaboration with Nobel Prize Outreach, and with support from the Sloan Foundation Learn more about how TED-Ed partnerships work: http://t.ted.com/Rbx7KCW Visit https://ed.ted.com/nobel-prize to explore more ideas, innovations, and achievements honored by the Nobel Prize Support Our Non-Profit Mission ---------------------------------------------- Sup

Explore the physics of magnetism, and how its properties are used in modern technologies like MRI machines, hard drives, and more. -- In the 1920s, physicists still had many unanswered questions about magnetism. While they knew that every electron and proton have invisible, magnetic fields that radiate out in closed loops from one end to the other, they wondered: what determines the direction of these magnetic fields? And if every atom is composed of these tiny magnets, why isn’t everything magnetic? Rachel Yang investigates. Lesson by Rachel Yang, directed by Tolga Yıldız, Kozmonot Animation Studio. This video was made possible in collaboration with Nobel Prize Outreach, and with support from the Sloan Foundation Learn more about how TED-Ed partnerships work: http://t.ted.com/Rbx7KCW Visit https://ed.ted.com/nobel-prize to explore more ideas, innovations, and achievements honored by the Nobel Prize Support Our Non-Profit Mission ---------------------------------------------- Sup

Trace the history of passports to find out why we need these documents and what challenges travelers face within this system. -- Passports are not the first form of travel documents: in Ancient Egypt, travelers carried “letters of safe conduct” issued by rulers; in Han China and Tudor England, foreigners were issued travel passes. However, for much of human history, borders have been relatively fluid, and travel lacked bureaucratic requirements. So, what changed? Kristin Surak details the history of the passport system. Lesson by Kristin Surak, directed by Tomás Pichardo-Espaillat. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twi

Trace the history of passports to find out why we need these documents and what challenges travelers face within this system. -- Passports are not the first form of travel documents: in Ancient Egypt, travelers carried “letters of safe conduct” issued by rulers; in Han China and Tudor England, foreigners were issued travel passes. However, for much of human history, borders have been relatively fluid, and travel lacked bureaucratic requirements. So, what changed? Kristin Surak details the history of the passport system. Lesson by Kristin Surak, directed by Tomás Pichardo-Espaillat. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twi

Trace the history of passports to find out why we need these documents and what challenges travelers face within this system. -- Passports are not the first form of travel documents: in Ancient Egypt, travelers carried “letters of safe conduct” issued by rulers; in Han China and Tudor England, foreigners were issued travel passes. However, for much of human history, borders have been relatively fluid, and travel lacked bureaucratic requirements. So, what changed? Kristin Surak details the history of the passport system. Lesson by Kristin Surak, directed by Tomás Pichardo-Espaillat. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twi

Trace the history of passports to find out why we need these documents and what challenges travelers face within this system. -- Passports are not the first form of travel documents: in Ancient Egypt, travelers carried “letters of safe conduct” issued by rulers; in Han China and Tudor England, foreigners were issued travel passes. However, for much of human history, borders have been relatively fluid, and travel lacked bureaucratic requirements. So, what changed? Kristin Surak details the history of the passport system. Lesson by Kristin Surak, directed by Tomás Pichardo-Espaillat. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twi

Explore the incredible systems that create breathable air in space, and how we can adapt that process for future expeditions. -- For over 25 years, the International Space Station’s air supply systems have revolutionized space missions. Yet the need for regular maintenance, repairs, and upgrades has pushed engineers to develop even more reliable systems for future spacecraft. How do we create breathable air in space? And what does that look like for longer expeditions? Alvaro Romero-Calvo and Theo St Francis investigate. Lesson by Alvaro Romero-Calvo and Theo St Francis, directed by Lazy Chief. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook F

Explore the incredible systems that create breathable air in space, and how we can adapt that process for future expeditions. -- For over 25 years, the International Space Station’s air supply systems have revolutionized space missions. Yet the need for regular maintenance, repairs, and upgrades has pushed engineers to develop even more reliable systems for future spacecraft. How do we create breathable air in space? And what does that look like for longer expeditions? Alvaro Romero-Calvo and Theo St Francis investigate. Lesson by Alvaro Romero-Calvo and Theo St Francis, directed by Lazy Chief. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook F