On what would have been the 180th birthday of the Venn Diagram creator. Making logic cute and whimsical. ... (mammals and sea life, for example) along with five descriptors (thrives in cold, has ...

Today’s Google logo is a hat-tip to British logician and philosopher, and inventor of the Venn diagram, John Venn on his 180th birthday. Born on this date in 1834, Venn came up with the idea of ...