Linked from

The 16 pages that link to Eratosthenes, each with the reason it gives.

• GeodesyRelated: His calculation established an early geometric method for measuring Earth.

• Hellenistic periodRelated: His research joins geographical measurement with the institutional scholarship of Alexandria.

• AlexandriaRelated: His work joined the city's library, geography, and mathematical inquiry.

• Library of AlexandriaRelated: His leadership linked the institution to advances in geography and measurement of the Earth.

• StraboRelated: Strabo scrutinized Eratosthenes’ influential account of the inhabited world.

• Greek mathematicsRelated: His estimate demonstrates how geometry could turn local observations into planetary measurement.

• Doubling the cubeRelated: He described a mechanical device for finding the two mean proportionals.

• Sieve of EratosthenesRelated: The sieve bears his name, though surviving evidence about its original presentation is limited.

• GnomonRelated: His measurement depended on comparing the Sun’s angle, inferred from shadows, at Syene and Alexandria.

• Tropic of CancerRelated: His geography helped establish the classical system of named terrestrial parallels.

• Ancient Greek geographyBroader topic: His geometry offered a quantitative foundation for mapping the inhabited world.

• Cosmos: A Personal VoyageBroader topic: His measurement demonstrates how observation and geometry can reveal planetary scale.

• Spherical EarthRelated: His estimate showed that a spherical Earth could be measured quantitatively.

• Earth’s shadowRelated: His shadow-based geometry shows how sunlight can reveal Earth’s size without observing its outline from space.

• History of geographyBroader topic: His measurement of Earth and use of the name geography mark an early foundation for the discipline.

• Pomponius MelaRelated: His work helped establish the geographic tradition inherited by Roman authors such as Mela.