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4:46
A.J. Jacobs
The life cycle of a cup of coffee
19:22
Marcelo Mena
The economic benefits of climate action
16:22
Kristine Tompkins
Let's make the world wild again
9:56
Johanna Figueira
Simple, effective tech to connect communities in crisis
6:03
Carlos Bautista
The awful logic of land mines -- and an app that helps people avoid them
4:50
Armando Azua-Bustos
The most Martian place on Earth
19:40
Ingrid Betancourt
What six years in captivity taught me about fear and faith
16:40
Jorge Drexler
Poetry, music and identity
15:37
Ian Bremmer
How the US should use its superpower status
6:59
Sarah Parcak
Hunting for Peru's lost civilizations -- with satellites
9:28
Franz Freudenthal
A new way to heal hearts without surgery
21:48
Sarah Parcak
Help discover ancient ruins -- before it's too late
14:37
Francesco Sauro
Deep under the Earth's surface, discovering beauty and science
15:49
Andrés Ruzo
The boiling river of the Amazon
14:17
Enrique Peñalosa
Why buses represent democracy in action
12:21
Eduardo Paes
The 4 commandments of cities
5:34
Juliana Machado Ferreira
The fight to end rare-animal trafficking in Brazil
18:00
Isabel Allende
Tales of passion
15:43
Jaime Lerner
A song of the city
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