Stonehenge as a Moon-Sun Calculator: The 1960s Eclipse Theory Debunked

In the 1960s, Gerald Hawkins argued Stonehenge functioned as a prehistoric calculator that could track the Sun and Moon and predict eclipses, using a 56-hole circle and an early computer; his book Stonehenge Decoded popularized the idea, but subsequent research has largely discredited it, showing Stonehenge was built in multiple phases over around 1,500 years with approximate alignments, making it an astronomical observatory/monument rather than a precise eclipse-predicting computer.