|
230 BC| c. 400 BC–AD c. 250 | Central America [everyday life] | The Late Formative (or pre-Classic) period of Mayan culture takes place in Mexico. By 400 BC, large structures have been built at several sites in the tropical lowland jungle. In the highlands, people begin to put up large clay platforms, some the basis for temples and others for elite houses, flanking open plazas. | | c. 230 BC | Greece [maths] | Greek scholar Eratosthenes of Cyrene develops a method of finding all prime numbers. Known as the sieve of Eratosthenes it involves striking out the number 1 and every nth number following the number n. Only prime numbers then remain. | | c. 230 BC | Egypt, Ptolemaic Kingdom [maths] | Alexandrian mathematician Apollonius of Perga writes Conics, a systematic treatise on the principles of conics in which he introduces the terms ‘parabola’, ‘ellipse’, and ‘hyperbola’. | | c. 230 BC | Seleucid Kingdom [technology] | Copper-lined pottery jars, with asphalt plugs, containing metal rods – the first electric battery – are used in Baghdad to coat objects with thin layers of gold or silver – the first example of electroplating. |
How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
?Sign in  |
|---|
|
|
|