The Antikythera Mechanism has been described as the world’s first analog computer since it was found in a shipwreck off the coast of Greece in 1901, but until now, we don’t know exactly how it was configured inside. The Anticythera Mechanism – a fragmentary chronographic artifact discovered in a Roman shipwreck in 1901, has been called the world’s first analog machine since the day of its discovery. However, its internal dynamics have remained mysterious for the last 2000 years. One of the first major pieces of research with the new method was conducted by scientists at the University of Glasgow using experimental archeology in conjunction with the findings of Chris Budiselic (Clickspring)’s experimentally constructed Antica Tyrrhenia mechanism. The data were incorporated into the full analysis using Bayesian statistics (first developed to detect gravitational waves). The end result of this interdisciplinary research confirmed that this device was constructed and calibrated to track the lunar calendar and can give us a glimpse of how ahead of their time the ancient Greek craftsmen were and how advanced they were at the same point in history compared to today’s modern digital computers.
Chris Budiselic helps scientists solve the mystery of world’s oldest computer
According to the University of Glasgow, YouTuber Chris Budiselic, creator of the YouTube channel ‘Clickspring’, can be credited with initiating a breakthrough that arose from his years of documenting efforts to create a true-to-history replica of the Antikythera Mechanism. This process allowed them to provide researchers Graham Vaughan and Joseph Bayley with important physical data, aiding the use of modern statistical models to analyze ancient pieces of the mechanism. His applied experimental archeology provided researchers with baseline data that traditional observational methods have been unable to obtain for more than 100 years.
How scientists mapped a 2,000-year-old ring
Glasgow researchers used Bayesian analysis to determine that the mechanism’s calendar ring had either 354 or 355 holes, as written in The Horological Journal. This method is a statistical analytical method commonly used to analyze gravitational wave signals in space by removing background noise. Their use of this method along with data provided by ClickSpring Replication showed that the calendar was created to follow the Greek lunar calendar, which had 354 days (hereafter an intercalary day). Therefore, it was not a representation of the solar 365-day calendar.
Why was 2,000-year-old computing ahead of its time?
According to this research, the holes in the ring were arranged with a radius of about 77.1 millimeters with a radial variation of only 0.028 millimeters, which indicates that the ancient Greeks were probably able to apply very sophisticated segmentation machinery or geometric techniques. These results prove that technological advancements were far more advanced than previously thought, and mechanical computing was significantly more advanced than it was 2,000 years ago.
How the ancient Greeks mechanically coded in bronze with this device
Originally discovered in 1901 off the coast of the island of Antikythera, Greece, the device was built around 60–70 BC, and is now considered the earliest remaining example of analog computing in the world. The Antikythera Mechanism functions as an astronomical calculator, mechanically encoding the solar eclipses and epicyclic motions of the five known planets through carefully calibrated gear tooth geometry.