Lesson 801 – Tlaloc’s Revenge-Mexico City’s Hydrological Heritage Mexico City, with a population of 20 million and one of the largest cities in the world, has had significant...
Lesson 802 – Medellín- A Colombian Transformation David Yetman visits Colombia where he explores the town of Medellín, the second largest city in Colombia, and shares its...
Lesson 803: Baroque Pipe Organs of Oaxaca Host David Yetman explores the history of Oaxaca and the efforts to preserve the religious meaning of the organ pipe...
Lesson 804: Ancestors of the Ancient Mayas David Yetman travels with researchers from University of Arizona to the city of Palenque in Chiapas, Mexico where there are...
Lesson 805: From the San Juans to Moab by Mountain Bike David Yetman, along with seven friends, journey from San Juan to Moab on mountain bikes and experience challenges of the...
Lesson 806 – Islands in the Desert Chiricahua National Monument is one of several sky islands in southeastern Arizona. Sky islands are isolated mountains surrounded by radically different lowland...
Lesson 807: Kites of the Dead in Guatemala Day of the Dead is observed throughout Central America and each region celebrates in its own fashion. One small town...
Lesson 808: Under the shadows of the Volcanoes In the United States, about once every fifty years there is a volcanic eruption and about every twenty years or...
Lesson 809 – Drought and New Realities in the Southwest The Colorado River and its tributaries form the hydraulic backbone of the Southwest. It is an endangered river because there...
Lesson 810: Colombia’s Guardians of the Homelands At the southwestern edge of the Caribbean Sea and the northern tip of Colombia, an enormous mountain covered by glaciers...
