The Circle Graph and Pie Chart . No one really knows how Playfair dreamt up the pie chart. Some wonder whether it’d always been around—and if Playfair was just the first to actually publish one.

The taste graph includes two million venues that were added by two million people who checked-in to the various locations. Check out more Infographics on the Technology Channel. About the Author ...

Old People Versus Babies, In One Graph. November 8, 2012 9:03 AM ET. ... Each circle represents a country; put your cursor on the circle for detailed info. *Elderly refers to 65 and over.

Entry in the 2011 Urban Water Design Challenge, sponsored by Visualizing.org and Circle of Blue. Carlo Llacar submitted this infographic for the 2011 Urban Water Design Challenge—sponsored by Circle ...