Thirty-five years ago string theory took physics by storm, promising the coveted unified theory of nature’s forces that Einstein valiantly sought but never found. In the intervening decades, string theory has brought a collection of mind-boggling possibilities into the lexicon of mainstream thinking—extra dimensions of space, holographic worlds, and multiple universes. Some researchers view these developments as symptoms of string theory having lost its way. Others argue that string theory, although very much still a work in progress, is revealing stunning new qualities of reality. Join leading minds in theoretical physics for a whirlwind ride through the twists and turns of string theory—its past, its future, and what it tells us about the search for the universe’s final theory.

PARTICIPANTS: Marcelo Gleiser, Michael Dine, Andrew Strominger

MODERATOR: Brian Greene

MORE INFO ABOUT THE PROGRAM AND
PARTICIPANTS: https://www.worldsciencefestiv....al.com/programs/loos

This program is part of the BIG IDEAS SERIES, made possible with support from the JOHN TEMPLETON FOUNDATION.

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TOPICS
0:00 - Introduction
3:54 - Program introduction
5:40 - Marcelo Gleiser introduction
6:26 - Unification of electricity and magnetism
10:30 - Unification of space and time
13:49 - Einstein’s General Theory of Relativity
18:38 - Standard model of particle physics
21:56 - Supersymmetry
26:14 - The Island of Knowledge
32:01 - Godel’s Incompleteness Theorems
34:27 - String Theory explainer film
37:07 - Michael Dine introduction
38:35 - Supersymmetry and the spectrum of particles
42:18 - Large Hadron Collider
44:57 - Extra dimensions of space
50:34 - Dark energy and multiple universes
56:40 - Progress since the 1980s and the future of particle physics
59:55 - Andrew Strominger introduction
1:00:53 - Einstein and black holes
1:03:59 - The black hole information paradox
1:07:30 - Stephen Hawking’s insights into black holes
1:12:00 - Using string theory to understand black holes
1:19:33 - Conformal symmetry
1:22:48 - Andrew Strominger’s view of string theory

CREDITS
- Produced by Laura Dattaro
- Associate Produced by Peter Goldberg
- Editing and Animation by Josh Zimmerman
- Music provided by APM
- Additional images and footage provided by: Getty Images, Shutterstock, Videoblocks, Event Horizon Telescope
- Recorded at NYU Skirball Center

The multiverse hypothesis, suggesting that our universe is but one of perhaps infinitely many, speaks to the very nature of reality. Join physicist Brian Greene, cosmologists Alan Guth and Andrei Linde, and philosopher Nick Bostrom as they discuss and debate this controversial implication of forefront research and explore its potential for redefining the cosmic order. Moderated by Robert Krulwich and featuring an original musical interlude, inspired by parallel worlds, by DJ Spooky.

This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation.

The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.
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Original Program Date: June 13, 2009
MODERATOR: Robert Krulwich
PARTICIPANTS: Alan Guth, Brian Greene, Andrei Linde, Paul D. Miller, Nick Bostrom

Introduction with Brian Greene 00:00

Musical interlude 25:15

Participant Introductions 33:49

How do we know there was a Big Bang 35:50

How do we get from a single universe to a multiverse. 47:14

Is the universe expanding and how fast? 01:00:25

What does six dimensional space look like? 01:08:00

How do we know there is a multiverse? 01:13:48

Bryce DeWitt on the multiverse concept 01:24:40

What if we assume the universe is the simulation hypothesis? 01:37:14

This program is part of The Big Idea Series, made possible with support from the John Templeton Foundation.

This edition of #JournalistsHangout discusses the abduction of students in Kebbi state and other security challenges.

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Yvan Sagnet from Cameroon is battling modern slavery in Italy's agricultural sector. Sagnet once worked as a low-wage farmhand. Now he is fighting for the rights of seasonal farmworkers, taking criminal recruiters, or gangmasters, to court.

Yvan Sagnet calls them slaves: the hundreds of thousands of seasonal farmworkers from Africa and eastern Europe on Italy's fields. Without their labor the country would have no tomato, orange or olive harvest. But the workers are exploited and often forced to live under inhumane conditions in ruins or shanty towns called ghettos. In 2011 Sagnet himself briefly picked tomatoes on the fields near the southern Italian town of Nardò. For four days he labored to fill the 350-kilogram crates. He earned 14 euros a day, ten of which he had to hand over to the gangmaster, or Caporale, for transport and water. Caporale is the term for the criminal recruiters who control and exploit the workers. After a 14-hour day working under the blazing sun and even being beaten, Sagnet took home only four euros. He helped to organize the first strike among the farmhands. It was a success, and since then he has been an activist for the rights of the farmworkers and against the gangmasters. Despite death threats, he has set up an organization called NoCap, a label to certify produce farmed under ethically acceptable conditions. And he has taken his fight against exploitation and slavery to the courts. So far, the Italian justice system has responded slowly. It's a fight that will take a long time to win.

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Aquaponics combines two growing methods, aquaculture and hydroponics, to create a self-contained, well-balanced ecosystem. Fish are fed and raised in a tank and as gravity pulls the wastewater through a hydroponic garden, bacteria feed on the waste, breaking it down into essential nutrients for the plants to grow. The system then returns the cleaned water back to the fish reservoir so the process can begin again.

In this episode, Charles Collins shares his backyard aquaponic and hydroponic gardens where he's able to grow tilapia, leafy greens, peppers, herbs and so much more, all in the suburban desert. Together we grow!

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ABOUT PARAGRAPHIC

A story is more than a title. We are a small team of independent filmmakers focused on emerging interests. We love exploring the wide landscape of these enthusiast communities through personal stories from their most passionate creators. The underdog, the obsessed, the misunderstood, the ones who have committed everything to their craft. For them it's more than a hobby; it's a way of life.

From garage bakeries and gourmet mushrooms to vertical farming and worm composting, these stories will elevate your understanding and deepen your appreciation.

Look beyond the impression.

#aquaponics #hydroponics #aquaculture

This video, from 1986, demonstrates hand-powered percussion water well drilling. Developed in China in 1100 B.C., it was used until the late 1800's, when larger, motorized versions became prevalent.More information, including our drilling manuals, can be found at: http://www.wellspringafrica.org©1986-2016 Wellspring Africa and Cliff MissenThis video is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.This means you may copy the video and share it widely. If you can, please let us know when you do. It makes us happy.You may re-use the materials on this CD-ROM for your own purposes, as long as you give Wellspring Africa credit and freely share the resulting works.