In Svalbard, Norway, the Global Seed Vault celebrated its 10th anniversary by adding its one-millionth seed.
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Michael Jackson's 'Thriller' hit number one on the Billboard 200 and stayed there for 37 weeks.
Robert Watson-Watt demonstrated radar in Slough, England, UK.
Oprah Winfrey was declared not guilty after cattlemen tried to sue her for saying American beef could spread mad cow disease.
Valentinian I, also known as Valentinian the Great, ascended to the throne as the Roman emperor.
Nineteen tourists were killed in a hot air balloon crash in Luxor, Egypt.
