# When Was the Pyramid of the Sun Unearthed?
## "The Place Where Gods Were Born" or "City of the Gods"
## How Many Pyramids and Lost Cities Still Remain Hidden?
### Teotihuacan: The Buried Mystery That Could Rewrite the History of Civilization
### Introduction
The photograph you shared is one of the most iconic images in American archaeology. The top panel captures the ancient appearance of the great pyramid prior to modern excavations, when it resembled nothing more than a natural, vegetation-covered hill. The bottom panel reveals the monument after decades of painstaking excavation and restoration.
The correct name of this archaeological site is **Teotihuacan**, located in modern-day Mexico, about 25 miles northeast of Mexico City. The structure shown is the famous **Pyramid of the Sun**, one of the largest pyramids on Earth. This image is frequently used to illustrate how monumental architecture can remain completely hidden for centuries—or even millennia—beneath layers of soil, overgrowth, and sediment.
This realization sparks a fascinating question: **How many other pyramids, temples, and ancient cities still lie buried beneath forests, deserts, and mountains around the world?**
### Teotihuacan: The Place Where the Gods Were Born
The name "Teotihuacan" was not given to the city by its original builders.
Centuries after the city was abandoned, the Aztecs stumbled upon the massive ruins and named the site Teotihuacan, a phrase generally translated as:
* **"The place where gods were born"** or
* **"City of the Gods."**
By the time the Spanish arrived in Mexico in the 16th century, the city had already been abandoned for hundreds of years. To this day, we still do not know with absolute certainty who actually founded Teotihuacan.
### When Was the Pyramid of the Sun Unearthed?
The pyramid was never entirely forgotten. Local inhabitants always knew it was there, though it was long perceived as an artificial hill partially swallowed by nature.
While the first preliminary archaeological investigations took place in the 19th century, major excavations did not begin until the dawn of the 20th century. Between **1905 and 1910**, Mexican archaeologist **Leopoldo Batres** led a massive excavation project in preparation for the centennial celebrations of Mexico's independence. Batres removed staggering amounts of earth and vegetation, finally revealing the monumental structure we recognize today.
#### How Did They Know It Was a Pyramid?
Truth be told, it never vanished completely. Archaeologists noticed several telltale signs:
* Unusual geometric alignments
* Partially visible staircases
* Artificial platforms
* Hewn stone blocks
Excavations gradually proved that this "mountain" was actually a monumental structure built by human hands.
This same phenomenon has occurred all over the globe. Many ancient pyramids end up looking exactly like natural hills after centuries of **erosion, dense vegetation growth, earthquakes, and sediment deposition.**
### Who Built Teotihuacan?
This question lies at the heart of one of the greatest archaeological debates in the Americas.
#### The Traditional Academic Theory
The mainstream consensus among archaeologists is that Teotihuacan was built by a distinct Mesoamerican civilization that predated the Aztecs. The most widely debated candidates include:
* The Totonacs
* Otomi-speaking peoples
* Early Nahua groups
* A unique, multi-ethnic Teotihuacan civilization
Today's consensus leans toward the idea that the city developed its own cosmopolitan identity. It flourished roughly between **100 BCE and 550 CE**. At its peak, it housed between **100,000 and 200,000 residents**, making it one of the largest urban centers on the planet at the time.
#### A Masterclass in Engineering
The sheer sophistication of the city continues to stun modern researchers:
* **Urban Planning:** The city was laid out along an incredibly precise geometric axis. The famous **Avenue of the Dead** serves as the central spine organizing most of the city.
* **Hydraulic Engineering:** Excavations have uncovered a vast network of canals, drainage systems, reservoirs, and advanced water-management infrastructure.
* **Monumental Architecture:** The Pyramid of the Sun stands roughly **213 feet (65 meters) tall** with a base spanning over **700 feet (200 meters)**. Its total volume rivals some of the greatest structures of the ancient world.
* **Astronomical Alignment:** Numerous researchers have identified alignments tied to solar cycles, planetary positions, and stellar observations, though the exact depth of their astronomical knowledge remains a subject of debate.
### Alternative and Non-Academic Theories
Over the last few centuries, a variety of alternative interpretations have captured the public imagination.
#### Atlantis
Some authors have suggested a direct link to the legendary lost continent of **Atlantis**. However, there is zero archaeological evidence to support this hypothesis.
#### Survivors of a Lost Civilization
Alternative historians like **Graham Hancock** propose that highly advanced societies existing before the end of the last Ice Age may have passed down architectural and astronomical knowledge to later cultures. This hypothesis remains highly controversial and rejected by mainstream science.
#### Ancient Astronauts
Another popular pop-culture theory claims that extraterrestrial visitors aided in the construction. To date, there is no verifiable scientific evidence to support this claim.
#### Antediluvian Knowledge
Various esoteric and religious traditions argue that survivors of a cataclysmic global flood preserved advanced knowledge of geometry, astronomy, and architecture. This narrative appears across global folklore, including:
* Mesoamerican traditions
* Hindu texts
* Sumerian tablets
* Biblical accounts
### What New Technologies Are Revealing
This is where modern exploration gets incredibly exciting. For centuries, archaeologists had to rely strictly on shovels and physical excavation. Today, we have revolutionary tools at our disposal.
#### LiDAR (Light Detection and Ranging)
LiDAR shoots millions of laser pulses from aircraft down to the ground, piercing through dense jungle canopies to map the hidden topography below. Thanks to LiDAR, researchers have recently discovered:
* Thousands of hidden Maya structures
* Ancient highways (sacbeob)
* Terraced fields and reservoirs
* Entire lost cities hidden beneath dense rainforests
#### Ground-Penetrating Radar (GPR)
GPR allows archaeologists to map what is directly beneath their feet—detecting **tunnels, chambers, foundations, and buried artifacts**—without ever swinging a pickaxe or destroying the site.
#### High-Resolution Satellite Imagery
Space-based archaeology uses satellite data to reveal hidden geometric patterns, buried walls, ancient roads, and forgotten settlements that are completely invisible from the ground.
### Is There Much More Left to Find?
The answer is an overwhelming **yes**. Most modern archaeologists believe we are only scratching the surface of understanding the true scale of ancient civilizations.
* **The Americas:** The dense jungles of the **Amazon, Guatemala, Honduras, and Belize** have already yielded thousands of hidden structures. Experts believe tens of thousands of sites are still waiting to be found.
* **Africa:** Massive swathes of the continent remain archaeologically under-explored, particularly within the **Sahara, the Congo Basin, Ethiopia, and Sudan**.
* **The Middle East:** Advanced satellite imaging continues to uncover buried cities, ancient irrigation systems, and long-lost trade routes beneath the desert sands.
* **Asia:** Laser scanning in the jungles of Cambodia has revealed massive urban sprawls surrounding **Angkor**, proving that ancient Khmer civilizations occupied far more territory than anyone previously imagined.
### Perspective
The "before and after" imagery of the Pyramid of the Sun serves as a powerful symbol of the current state of human knowledge. It reminds us that what we call a "mountain" today might turn out to be a pyramid tomorrow. What looks like an untouched, pristine forest might be hiding a metropolis. What we dismiss today as mere myth might hold fragments of a historical reality we don't yet understand.
Twenty-first-century archaeology is proving that the human past is vastly more complex than we ever imagined. At the same time, an absence of immediate explanations should not be used as an excuse to validate wild, unproven theories. The real challenge of modern exploration lies in balancing an open, imaginative mind with the rigorous, uncompromising truth of the scientific method.
### Conclusion
Teotihuacan remains one of humanity's greatest unsolved puzzles. We know it was a breathtaking metropolis with advanced urban planning, monumental architecture, and a cultural reach that influenced all of Mesoamerica. Yet, we still do not know who its founders were, what language they spoke, or why they ultimately walked away from it all.
As LiDAR, GPR, and satellite remote sensing usher in a golden age of discovery, it is clear that thousands of temples, cities, and monuments still wait in the shadows—buried under forests, deserts, and mountains across every continent.
Perhaps the greatest lesson Teotihuacan teaches us is this: **The story of human civilization is far from complete.**
### References (Chicago / American Academic Style)
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