Where do we get our mathematical symbols from? Why is the set of integers called ℤ ? When was the equals sign first used? How about zero? Good notation tends to catch on quickly, whereas bad notation can obscure beautiful theory.

The lecture explores how the introduction of new notation has paved the way for new leaps in understanding, and considers some mathematical quirks of language, such as what the number 4 in English has in common with the number 11 in Russian.

A lecture by Sarah Hart

The transcript and downloadable versions of the lecture are available from the Gresham College website:
http://www.gresham.ac.uk/lectu....res-and-events/maths

Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.

Website: https://gresham.ac.uk
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Presented by Ron Eglash; co-hosted by the University of Michigan School of Information and the Library of Michigan; project made possible in part by the University of Michigan School of Information. For an audio transcript of this video, please visit https://drive.google.com/open?....id=13y47iQrviZN-oFX7 .

Electromagnetism is one of the fundamental forces and is the glue that holds all matter together. Find out how photons, the charged particles that allow us to see the world around us, are at the heart of electromagnetism.

Catch new episodes of HOW THE UNIVERSE WORKS Tuesdays at 10/9c on Science! | http://science.discovery.com/t....v-shows/how-the-univ

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Jim explores what are the most popular interpretations of quantum mechanics and how we might need to be a little more specific when we talk about ‘reality’.
Jim's book "Quantum Reality" is now available on Amazon: https://geni.us/OF5X

Watch the Q&A: https://youtu.be/Udy2Rs-t47o

Jim Baggott is an award-winning science writer. He trained as a scientist, completing a doctorate in chemical physics at the University of Oxford in the early 80s, before embarking on post-doctoral research studies at Oxford and at Stanford University in California.

He gave up a tenured lectureship at the University of Reading after five years in order to gain experience in the commercial world. He worked for Shell International Petroleum for 11 years before leaving to establish his own business consultancy and training practice. He won the Royal Society of Chemistry’s Marlow Medal for his contributions to scientific research in 1989.

This talk was streamed live by the Ri on 14 July 2020.

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Writing is generally agreed to be among the greatest inventions in human history, perhaps the greatest invention, since it made history possible.
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You can read more about Irving's quest to explore the Noah's Ark myth in "The Ark Before Noah: Decoding the Story of the Flood": https://geni.us/zU95bVO
or learn more about cuneiform writing in "Cuneiform": https://geni.us/eMPb

Writing seems to have been invented in the late fourth millennium BC in Mesopotamia in the form of wedge-shaped marks pressed into soft clay with a reed stylus: the script known as cuneiform. Through his work on this ancient language, Irving Finkel, has uncovered amazing secrets from over five thousand years ago, including the story behind Noah’s ark.

Irving Finkel is the curator in charge of cuneiform inscriptions on tablets of clay from ancient Mesopotamia at the British Museum, of which the Middle East Department has the largest collection of any modern museum. This work involves reading and translating all sorts of inscriptions, sometimes working on ancient archives to identify manuscripts that belong together, or even join to one another. He is the author of The Ark Before Noah: Decoding the Story of the Flood.

This talk was filmed in the Ri on 18 January 2019.

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Does Africa have the potential to feed itself? Yes, and in the near future, says Bingu wa Mutharika, president of Malawi and current interim chair of the African Union."Africa is not poor," says Mutharika, who has been Malawi's president since 2004 and has a degree in economics. The continent, he says, "has decided to shift from Afro-pessimism to Afro-optimism."The president of the southeastern African nation outlines a strategy incorporating subsidies to small—especially women—farmers, improvements in irrigation, distribution of sturdy hybrid seeds, building and upgrading of roads, a push toward alternative clean energy sources such as wind and solar, an increased continent-wide investment in communications technology, and the establishment of a strategic partnership comprising nations such as Uganda, Egypt, Ethiopia, Ghana, and Zimbabwe, countries that Mutharika cites as having "track records of achievement in promoting agriculture and food security."Hosted by the African Presidential Archives & Research Center (APARC) on October 1, 2010.

Every child deserves a peaceful childhood and the chance to go to school. This is still being denied to millions of children around the world who are engaged in child labour. Half of these are suffering from the worst forms of child labour.
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For many people in the world, they get their water supplied to them through pipes in their houses or apartment. However, for the rest of the world not hooked up to centralized water, they get their water through either private or public wells. ‘

Wells are some of the most essential components to developing a sustainable society. They provide a clean and reliable supply of water for drinking, bathing, and irrigation, even in locations where water on the surface is scarce.

Wells are essentially just holes in the ground filled with water, but they have more complexities than meets the eye. Let’s take a closer look at how wells work.

All images and videos courtesy of the creative commons or used in accordance with fair use laws. For questions or concerns, please use the contact section on our channel

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Divider by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
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In this video, I showcase how my typical day starts and ends at Ubuntu Farms & Gardens, with some sights and sounds of #TheCityOfTheWhiteNile, Juba.
---------------------------------------------------------------------------------------------------------------------------🚩 Remember to subscribe and hit the bell "🔔" icon, so you don't miss out of this adventure For all Business Inquiries: Ubuntufarms.investment@gmail.com


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Organic farmers in Kenya shared their experiences with drought, and the benefits organic farming provides for them to build healthy soils and continue producing food.

“#IGrowYourFood” is a part of GoodFood4All” campaign.

There are many things that connect people the world over. Food is one of them. We all have to eat. And, everyone has the right to access affordable, nutritious, good food.

But what about those who grow our food?

Do we know enough about the challenges they face, the work they do and how we can support them?

Then, without farmers, how would we eat?

The “#GoodFood4All” campaign is organized by 25 partners across Europe who have come together in "Make Europe Sustainable for All", a 3-year cross-sectoral project to promote the ambitious implementation of the Sustainable Development Goals.

🎞 Also, check other videos from organic farmers diligently participated to share their own stories from the field:

#IGrowYourFood - Meet Gnavo Josephine, a pineapple farmer from Togo 🇹🇬
https://youtu.be/OaFASL2HK_s

#IGrowYourFood - Meet David Avelar from Portugal & hear what he has to say about Permaculture 🇵🇹
https://youtu.be/flNHvawzz2w

#IGrowYourFood - Meet Simon Mattsson from Australia 🇦🇺
https://youtu.be/Ia2XWAnlKzQ

#IGrowYourFood - Meet Yorgos Xepapadakos, an organic farmer from Greece 🇬🇷
https://youtu.be/EJf9AElCC9o

#IGrowYourFood - Meet Franciszek Kesler, an organic farmer from Poland 🇵🇱
https://youtu.be/3Bev9jr74mY

#IGrowYourFood - Meet Juan Carlos Mendoza Gonzalez, an organic farmer from El Salvador 🇸🇻
https://youtu.be/JoLWyxF3IX0

#IGrowYourFood - Meet Aurore Juillet, an organic market gardener from France 🇫🇷
https://youtu.be/40ly6vPlW60

#IGrowYourFood - Meet Penny Lange, an organic farmer from Ireland 🇮🇪
https://youtu.be/rrcIe_XQ4U4

#IGrowYourFood - Meet Giacomo Lepre, an organic farmer from Italy 🇮🇹
https://youtu.be/2C3S59Ysbvo

#IGrowYourFood - Meet Jonas Ringqvist, an organic farmer from Sweden 🇸🇪
https://youtu.be/2C3S59Ysbvo

#IGrowYourFood - Meet Mihai Sorin, an organic beekeeper from Romania 🇷🇴
https://youtu.be/vXaa-ynfZFA

#IGrowYourFood - Meet Jan Dirk & Irene Van de Voort, an organic farmer from Netherlands 🇳🇱
https://youtu.be/082OeBdTF9U

#IGrowYourFood - Meet Fergal Anderson, an organic farmer from Ireland 🇮🇪
https://youtu.be/4CPZtKqz8lI

#IGrowYourFood – Meet Helena, an organic farmer from Czech Republic 🇨🇿
https://youtu.be/whQEll-IO78

#IGrowYourFood - Meet Joseph Lwevuze, an organic farmer from Uganda 🇺🇬
https://youtu.be/sZN5qnW08eM

#IGrowYourFood - Meet Ieva Stragytė, an organic farmer from Lithuania 🇱🇹
https://youtu.be/sHTOhtduQE4

#IGrowYourFood - Meet Corazon de Raeymaecker, an organic farmer from Belgium 🇧🇪
https://youtu.be/m2cjAh1k2pY

#IGrowYourFood - Meet Lutz, Katharina, Christine & Felix, the organic farmers from Austria 🇦🇹
https://youtu.be/2iHpNw9ygMg

Good food 🥕🥔🍆 comes from sustainable, organic farming 🚜.

🔎 FIND OUT MORE about our ongoing campaigns ‘Good Food 4 All‘:
https://makeeuropesustainablef....orall.org/good-food-

🇪🇺 ‘Good Food 4 All‘ - a global campaign led by IFOAM - Organics International with the mission to promote the need for greater Sustainability in our Food and Farming Systems.

IFOAM – Organics International leading organic movement from all across Europe to build an inclusive, sustainable, and progressive future for all: Make Europe Sustainable for All.

🔘 Stay tuned with campaign updates on different social media platforms:

📲 SUBSCRIBE to our YouTube channel to watch campaign videos.
https://www.youtube.com/user/i....foam2007?sub_confirm

🔔 Hit the NOTIFICATION BELL ICON to join our 'Organic Squad' to get all the notifications for all uploads and live streams.

👍🏻 Stay connected on Facebook for stories, rich media posts:
https://www.facebook.com/ifoam.organic

👇🏻 Join the conversation on Twitter:
https://twitter.com/IFOAMorganic

#️⃣ Use campaign dedicated hashtag on YouTube, Twitter, Facebook, LinkedIn, Instagram:
#IGrowYourFood

💻 CHECK OUT the personal stories from organic farmers and updates from organic projects on our blog Organic Without Boundaries:
https://www.organicwithoutboundaries.bio/

Organic Farming Drives Sustainability in Global Agriculture
https://www.organicwithoutboundaries.bio/2019/04/11/organic-farming-drives-sustainability/

World Soil Day: How Organic can be a Solution to Soil Pollution
https://www.organicwithoutboundaries.bio/2018/11/30/world-soil-day-2018/

Copenhagen: Investing Public Money in Public Good
https://www.organicwithoutboundaries.bio/2018/11/14/public-money-public-goods/

📩 SUBSCRIBE to our blog ORGANIC WITHOUT BOUNDARIES for informative articles:
https://www.organicwithoutboundaries.bio/subscribe/

#IGrowYourFood #GoodFood4All #MakeEuropeSustainableForAll