Common knowledge is not considered plagiarism and does not need to be cited in your paper or bibliography. Common knowledge is information that is known by many people and is found in many sources. The following are examples of common knowledge that do not need to be cited:

• John F. Kennedy was assassinated on November 22, 1963 in Dallas, Texas
• Over 1 billion people live in China
• The Nile River flows into the Mediterranean Sea
• The human heart is part of the cardiovascular system
• Helium, neon, argon, krypton, xenon, and radon are noble gases in the Periodic Table of Elements