Zero, image: Indians were being the primary to make use of the zero like a image and in arithmetic operations, although Babylonians used zero to signify the 'absent'. Squat toilet: toilets platforms higher than drains, while in the proximity of wells, are found in various homes in the cities http://scientific-and-technical76554.pages10.com/A-Review-Of-Scientific-and-Technical-Instruments-Email-List-22834391