What shape is the Earth?

Article excerpt

Determining Earth's exact shape proved far harder than it seemed. For centuries, scientists debated whether our planet was a perfect sphere, slightly flattened, or something more complex. The quest to measure Earth's curvature and gravitational field required ingenious experiments, from pendulums swinging at different latitudes to satellites orbiting overhead. This seemingly simple question, what shape is the Earth?, became a crucible for scientific method itself, forcing researchers to grapple with precision, error, and the limits of human observation. The story reveals how measurement, not mere theory, underpins scientific progress.