khelraja

The Indus Valley civilization, situated in a resource-rich area (in modern Pakistan and northwestern India), is notable for its early application of city planning, sanitation technologies, and plumbing.[33] Indus Valley construction and architecture, called 'Vaastu Shastra', suggests a thorough understanding of materials engineering, hydrology, and sanitation.The Chinese made many first-known discoveries and developments. Major technological contributions from China include the earliest know form of the binary code and epigenetic sequencing[34][35] early seismological detectors, matches, paper, Helicopter rotor, Raised-relief map, t..