Untitled attachment
https://files.ohai.social/media_attachments/files/111/430/521/425/062/664/original/4a75aba77ad12069.jpg
British Archaeologist Leonard Woolley and his wife Catherine at the moment of the discovery of pottery pipes that were used as a sewage and rainwater network in what is considered the first water drainage system in history before about 4000 BC, Ur (Mesopotamia), moden-day Iraq, in 1930.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.