A new study indicates that ancient Egyptians used the fall equinox for the alignment of the Great Pyramid of Giza to the four cardinal points, north-south-east-west, with great accuracy. The method uses a vertical rod to track the movement of the sun on the equinox. The fall equinox occurs when the Earth’s tilt is such that leads to an approximately equal length of day and night. Continue reading “Alignment method of the Great Pyramid to cardinal points could be identified” →