Part 11/13:
They note that terrestrial and aerial observations consistently reveal that the Earth curves away from the observer in all directions, a fact that cannot be explained by flat models. The phenomenon of the horizon wrapping around us, especially at high elevations, is strong evidence of Earth's spherical shape.
Closing Remarks: Why Both Models Require Curvature
In conclusion, the presenter asserts that curvature along the front-to-back axis (the direction away from the observer) is unavoidable and essential for understanding Earth's shape. The existence of a curved horizon, observable through multiple independent methods and supported by physics, remains one of the most compelling pieces of evidence for a spherical Earth.