Título: Eratosthenes
Seção: "Father of geography"
Background: Eratosthenes of Cyrene (; Greek: Eratosthenes o Kurenaios, IPA:

Conteúdo: Eratosthenes now continued from his knowledge about the Earth. Using his discoveries and knowledge of its size and shape, he began to sketch it. In the Library of Alexandria he had access to various travel books, which contained various items of information and representations of the world that needed to be pieced together in some organized format. In his three-volume work Geography (Greek: [Geographika] ), he described and mapped his entire known world, even dividing the Earth into five climate zones: two freezing zones around the poles, two temperate zones, and a zone encompassing the equator and the tropics. He had invented geography. He created terminology that is still used today. He placed grids of overlapping lines over the surface of the Earth. He used parallels and meridians to link together every place in the world. It was now possible to estimate one's distance from remote locations with this network over the surface of the Earth. In the Geography the names of over 400 cities and their locations were shown: this had never been achieved before. Unfortunately, his Geography has been lost to history, but fragments of the work can be pieced together from other great historians like Pliny, Polybius, Strabo, and Marcianus.  The first book was something of an introduction and gave a review of his predecessors, recognizing their contributions that he compiled in the library. In this book Eratosthenes denounced Homer as not providing any insight into what he now described a

user: Why was he considered the father of geography?

assistant: Using his discoveries and knowledge of its size and shape, he began to sketch it.

user: What was he sketching?

assistant: In his three-volume work Geography (Greek: [Geographika] ), he described and mapped his entire known world,

user: Were his maps accurate?

assistant: even dividing the Earth into five climate zones: two freezing zones around the poles, two temperate zones, and a zone encompassing the equator and the tropics.

user: Who were his maps used by?

assistant: other great historians like Pliny, Polybius, Strabo, and Marcianus.

user: How was he able to make such accurate calculations?

assistant: He created terminology that is still used today. He placed grids of overlapping lines over the surface of the Earth.

user: what are some of the terms that are still used today?

assistant: In the Geography the names of over 400 cities and their locations were shown: this had never been achieved before.

user: How was he able to achieve this?

assistant: He cited countries and used parallel lines to divide the map into sections, to give accurate descriptions of the realms.

user: What were the different realms he used?

assistant: This was a breakthrough, and can be considered the beginning of geography.

user: Are there any other interesting aspects about this article?

assistant: In the second book is his discovery about the circumference of the Earth. This is where, according to Pliny, "The world was grasped."

user: How was he able to discover this?

assistant: " Eratosthenes described his famous story of the well in Syene, described above. This book would now be considered a text on mathematical geography.