While Venn diagrams may not have solved any long-standing open problems, surely these interlocking rings deserve more credit.

Yes, yes, Venn diagrams can teach math and business concepts and management lessons. It turns out they are also really excellent as Internet punchlines.

Venn had initially used diagrams developed by the Swiss mathematician Leonard Euler to show some relationships between sets, which he then developed into his famous Venn diagrams.

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.