Regardless of location or educational background, many people believe we are not alone in the universe. Strange sightings in the night sky, mysterious crop circles, and unexplained phenomena continue to spark curiosity and speculation. Since the time of ancient civilisations, cultures across the globe have reported visitations from otherworldly beings. The advanced knowledge evident in some ancient societies leaves many to wonder whether higher intellectual influences played a part in shaping human history. If you’re a fan of the TV show Ancient Aliens, you’ll enjoy exploring this intriguing list of questions and theories that continue to fuel debate today.
1. The Nazca Lines of Peru
Between 450 and 600 A.D., an ancient civilisation etched hundreds of figures, geometric shapes and lines into the surface of the Nazca Desert in Peru. The scale and precision of these geoglyphs — some stretching over 200 metres in diameter — can only be fully appreciated from the air. How did a people without aerial technology manage such a feat? And for what purpose?
2. The Teotihuacan Ruins
Nestled in the Mexican Basin lie the ruins of Teotihuacan, an ancient city marked by architectural brilliance. Its central “Pyramid of the Sun” is flanked by a network of structures believed to mirror the configuration of our solar system. Could this indicate advanced astronomical knowledge, or perhaps even contact with a civilisation beyond Earth?
3. Textual Evidence of Advanced Technology
Ancient Indian epics such as the Mahabharata and Ramayana describe flying machines (Vimanas) engaged in epic battles with weapons resembling those of mass destruction. Similarly, the biblical Book of Ezekiel recounts visions of human-like beings travelling through the sky in contraptions described as “wheels within wheels”. Are these simply metaphors — or something more literal?
4. Aliens or Ancient Astronauts?
Ancient astronaut theorists suggest that many megalithic structures were either built by extraterrestrials or constructed with their assistance. Around the world — from Africa to Australia — cave paintings and carvings depict humanoid figures with spiked halos or what look like helmets. Mayan carvings in Tikal, Guatemala, even feature figures in full-body suits, some with breathing apparatuses. Could these be early depictions of space travellers?
5. Ancient Aircraft
Intriguing artefacts have been discovered across Egypt and South America that seem to resemble modern aircraft. One Egyptian carving closely resembles a helicopter, while a wooden model recovered from a tomb bears an uncanny likeness to a glider or aeroplane. In Colombia, gold figurines dating back to 500–800 B.C. resemble jets or space shuttles. Even medieval paintings often depict mysterious flying objects in the skies. Are these coincidences, or ancient accounts of aerial technology?
6. Architectural Marvels
The Great Pyramid of Giza consists of around 100,000 massive stones, each weighing approximately two tonnes. Conventional theories suggest the Egyptians used ropes, wooden rollers and manpower — yet the logistics are mind-boggling. Similarly, Incan ruins and other megalithic sites show stones cut and fitted so precisely that no mortar was needed, and many of these constructions have withstood centuries of weather and seismic activity. Could these achievements have involved knowledge or tools lost to history — or gained from elsewhere?
7. The Sumerian Civilisation
The Sumerians thrived in what is now Iraq over 5,000 years ago, pioneering the wheel, written language, advanced agriculture, mathematics, and even military organisation. They credited their wisdom to gods known as the Anunnaki — deities that some believe were extraterrestrial visitors. Could their legacy be evidence of alien contact?
8. The Flower of Life
This sacred geometric symbol, composed of overlapping circles forming a hexagonal pattern, appears in ancient artworks from at least 20 different countries — including China, Israel, Great Britain and Romania. Though its origins are unknown, many believe the Flower of Life encodes the mathematical and scientific principles that underlie the universe. Did ancient people have knowledge we’ve only recently begun to understand?
9. The Antikythera Mechanism
Discovered in 1901 off the coast of Antikythera, Greece, this complex mechanical device dates back to around 100 B.C. Often described as the world’s first analogue computer, it accurately tracked celestial movements and predicted solar eclipses in a four-year cycle. Its complexity challenges our assumptions about ancient technological capability, and raises the question: how did such knowledge exist so early?
10. The Baghdad Battery
Unearthed near Baghdad in 1936, this clay jar — dating to around 224 A.D. — contained a copper cylinder and iron rod, sealed with asphalt. When tested, replicas of the object generated a small electric current. What purpose could this ancient power source have served? And how did the people of that era discover how to build it?
Final Thoughts: Were We Visited by Ancient Aliens?
Whether you’re a sceptic or a believer, these enduring mysteries challenge our understanding of history, technology, and human potential. Could ancient aliens really have walked among us — offering knowledge, assistance or inspiration? Or are these wonders simply testaments to the ingenuity of early civilisations?
We’d love to hear what you think. Are these clues of extraterrestrial contact, or just misunderstood history? Share your thoughts in the comments below — and if you enjoyed this article, don’t forget to share it with friends who love a good mystery!