| Sci & Tech Chronology: In the year 640 |
Transportation
For the last time, the canal begun by Pharaoh Necho about 1200 years earlier is restored to use, this time by the Arab general 'Amr ibn-al-'As. It is covered in sand for good sometime in the eighth century as later Arab rulers allow the entire canal system of Egypt to fill in, resulting in massive famine when there is no longer irrigation for Egypt's fields. See also 100 Transportation; 1856 Transportation.
| Wikipedia: 640 |
| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 610s 620s 630s 640s 650s 660s 670s |
| Years: | 637 638 639 640 641 642 643 |
| 640 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 640 DCXL |
| Ab urbe condita | 1393 |
| Armenian calendar | 89 ԹՎ ՁԹ |
| Bahá'í calendar | -1204 – -1203 |
| Berber calendar | 1590 |
| Buddhist calendar | 1184 |
| Burmese calendar | 2 |
| Byzantine calendar | 6148 – 6149 |
| Chinese calendar | 己亥年十二月初三日 (3276/3336-12-3) — to —
庚子年十一月十三日(3277/3337-11-13) |
| Coptic calendar | 356 – 357 |
| Ethiopian calendar | 632 – 633 |
| Hebrew calendar | 4400 – 4401 |
| Hindu calendars | |
| - Vikram Samvat | 695 – 696 |
| - Shaka Samvat | 562 – 563 |
| - Kali Yuga | 3741 – 3742 |
| Holocene calendar | 10640 |
| Iranian calendar | 18 – 19 |
| Islamic calendar | 19 – 20 |
| Japanese calendar | |
| Korean calendar | 2973 |
| Thai solar calendar | 1183 |
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 | Sci & Tech Chronology. History of Science and Technology, edited by Bryan Bunch and Alexander Hellemans. Copyright © 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. Read more |
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