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In the World’s Largest Rainforest, a Prehistoric Metropolis Emerges After More Than 2,500 Years

31 Jan, 2024

This post was originally published on Colossal

Lidar image of a network of cities in the Ecuadorian rainforest.

Kunguints site, Upano Valley, Ecuador. Complexes of rectangular platforms are arranged around low squares and distributed along wide dug streets. Lidar images by A. Dorison and S. Rostain. Photos by S. Rostain, shared with permission

If someone were to ask you what you know about the history of the Amazon, what would you say? Archaeologist Stéphen Rostain, who knows a thing or two about the region, insists in a recent profile that the answer is “nothing, because the history that we think we know is wrong.” In a study recently published in Science, Rostain chronicles a 30-year research project and the astonishing discovery of a 2,500-year-old metropolis in the Ecuadorian rainforest, a “lost valley of cities.”

While previous expeditions to the area have documented large mounds and monuments throughout the area, the enormity and complexity of this find exceeded expectations with the discovery of thousands of houses, complex roads, plazas, ceremonial sites, and drainage canals. More than 6,000 rectangular earthen platforms, which were likely homes and communal buildings, are connected by a vast and sophisticated road network connecting 15 urban centers, surrounded by terraced agricultural fields.

Rostain and his colleagues used aerial Lidar, which stands for light detection and ranging, to scan an ancient network of cities extending across 115 square miles in the Amazon. Built around 500 B.C.E. and occupied for hundreds of years until the population began to migrate away between 300 and 600 C.E., the Upper Amazon site’s immense scale places it in league with comparable Maya urban systems recently found in Mexico and Guatemala.

You may also enjoy exploring Vinicius Peripato and Luiz Aragão’s recent survey of earthworks in Brazil that suggest thousands still hidden in the forest. (via Kottke)

 

Copueno site, Upano Valley, Ecuador. A dug main street crosses the urban area, creating an axis along which complexes of rectangular platforms are arranged around low squares

Complex of rectangular earth platforms of the Nijiamanch site along the cliff edge of the Upano riverbed, Ecuador. Image by S. Rostain

Lidar image of a network of cities in the Ecuadorian rainforest.

Kunguints site, Upano Valley, Ecuador. Dug streets cross the urban area where they are bordered by complexes of rectangular platforms arranged around low squares. The site is framed by two rivers

Earth platform of the Sangay site core, Upano Valley, Ecuador

Lidar image of a network of cities in the Ecuadorian rainforest.

Large-scale archaeological excavation on one earth platform of the Kilamope site, Upano Valley, Ecuador

Stéphen Rostain behind a pottery jar for sweet maize beer, known as a chicha, during an excavation on an earth platform of the Sangay site, Upano Valley, Ecuador

Lidar image of a network of cities in the Ecuadorian rainforest.

Do stories and artists like this matter to you? Become a Colossal Member today and support independent arts publishing for as little as $5 per month. The article In the World’s Largest Rainforest, a Prehistoric Metropolis Emerges After More Than 2,500 Years appeared first on Colossal.

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Australasian Waste Recycling Expo debuts as ReGen at ICC

Australasian Waste Recycling Expo debuts as ReGen at ICC

Australia’s circular resource exhibitors, buyers and thought leaders are set to attend ReGen | Australia’s Circular Resource Expo, taking place on 23–24 July 2025 at ICC Sydney.

The two-day trade event, organised by Diversified Australia, marks the evolution of what was previously known as the Australasian Waste Recycling Expo, a longstanding brand dedicated to resource management and waste reduction for over 15 years.

The rebrand to ReGen reflects the expo’s expanded scope and emphasis on the circular economy, welcoming an array of innovative exhibitors, experts and emerging professionals committed to reducing waste, promoting resource efficiency and fostering sustainable markets.

“At Diversified Australia, we’re proud to produce events that drive positive industry change,” said Ali Lawes, event director for ReGen at Diversified.

“ReGen embodies our commitment to equip and empower industry leaders and practitioners in support of Australia’s ambitious 2035 targets for waste elimination, resource circulation, and pollution reduction.”

ReGen will showcase technical displays, offer vital industry insights and feature keynote addresses, panel discussions and networking opportunities.

The program aims to help attendees — from seasoned experts to newcomers — navigate their roles in creating a circular economy that keeps resources in use, minimises waste and regenerates natural systems.

As part of its evolution, ReGen will incorporate Circularity, Australia’s original circular economy conference, into its 2025 education program.

Since its launch in 2022, Circularity has served as a platform for industry practitioners to discuss Australia’s transition to a circular economy.

Now integrated into ReGen, Circularity will reach a broader audience, offering free sessions on topics such as circular product design and sustainable waste management — ensuring these critical insights remain accessible to all attendees.

For the last three years Circularity has been proudly presented by Planet Ark’s Australian Circular Economy Hub in partnership with Diversified Australia.

Planet Ark CEO Rebecca Gilling said that integrating the country’s leading circular economy event into ReGen would offer even more impactful opportunities to drive Australia’s circular transition.

“The inclusion of Circularity into ReGen is a significant step forward in promoting circular economy principles on a national scale in collaboration with the waste and recycling industry,” Gilling said.

“At Planet Ark, we are thrilled to see Circularity evolve into a broader platform, ensuring critical conversations about sustainable resource management and circular product design reach more professionals and innovators than ever before. This partnership underscores the importance of collaboration in building a circular Australia.”

The expo’s name, ReGen, represents both the regenerative practices it champions and the generational transformation required to meet sustainability goals.

ReGen invites participants to “Rethink, Redesign, Repurpose, and Renew” as they contribute to a circular and sustainable future for Australia.

For more information and to register, visit regenexpo.com.au

Image credit: iStock.com/izusek

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