Worlds of data in seven beautiful #visualisations
▻http://www.newscientist.com/gallery/british-library-beautiful-science
These visual feasts are being celebrated in a new exhibition at The British Library in London, which shows how learning to visualise data helped shape science and society.
In 1854, during an outbreak of cholera in central London, physician John Snow interviewed local residents to find out where people were sick, and then plotted the cases on a map of the area. He found a distinct cluster centred on a water pump on Broad Street (now Broadwick Street). The schematic below prompted the local council to disable the pump, simply by removing its handle. The move helped to end the epidemic. Snow correctly concluded that cholera is waterborne and not caused by bad air, as most people believed at the time.