They discovered that around 300 B.C. an unknown African people had built a stone "observatory" with their sophisticated understanding of the motions of the Stars and the Moon. With their astronomical knowledge, these people created a very accurate lunar calendar.
In 1989 Doyle and Frank ventured further south on another expedition to the GREAT ZIMBABWE RUINS (click for photos). This vast complex dates back as far as 400 A.D and extends well over an acre. Built within it are significant astronomical alignments.
The articles below chronicle their findings.
