Carved from lidite—a stone typically found only at the bottom of the sea—this 6,000-year-old relic is covered in detailed engravings depicting what appears to be human fetal development at various stages. But how could an ancient civilization possess such advanced knowledge of embryology?

Linked to the Muisca culture, one of South America’s most sophisticated pre-Columbian societies, this 22 cm, 2 kg disk challenges everything we know about early science and technology. Some believe it holds the key to lost medical wisdom, while others speculate about extraterrestrial influences or forgotten civilizations.