Travellinglight/Alamy
If Stonehenge is a giant calendar, how did the ancient Britons measure the length of days precisely enough to put the Heel Stone in just the right place to mark the solstices? (continued)
Donald A. Windsor
Norwich, New York, US
Trial and error is how. I turned my house into a calendar by marking the shadows cast on the solstices and the equinoxes. My house faces south, so I record the noon shadow cast by the roof on the floor at the summer solstice and way up on the wall at the winter solstice, also for the equinoxes. The sun…
