Visual representations of scientific data have been used for centuries – in the 1500s, for example, Copernicus drew schematic sketches of planetary orbits around the sun – but the visual presentation of numerical data in the form of graphs is a more recent development. Scientists in different fields collect data in many different forms, from the magnitude and location of earthquakes, to the length of finch beaks, to the concentration of carbon dioxide in the atmosphere and so on. Although numerical data are initially compiled in tables or databases, they are often displayed in a graphic form to help scientists visualize and interpret the variation, patterns, and trends within the data.ĭata lie at the heart of any scientific endeavor. In some journals, as much as 30% of the space is taken up by graphs (Cleveland, 1984), perhaps surpassing the adage that "a picture is worth a thousand words." Although many magazines and newspapers also include graphs, the visual depiction of data is fundamental to science and represents something very different from the photographs and illustrations published in magazines and newspapers.
Absorption, Distribution, and Storage of Chemicals.
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