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References
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Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar
Ten Days That Vanished: The Switch to the Gregorian Calendar
Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.
9 Memorials and Monuments in the United States
Illustration for Demystified "How Dangerous is Quicksand"
How Deadly Is Quicksand?
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?
Aspirin pills.
7 Drugs that Changed the World
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”
Drinking water is poured into a glass.
Water Fluoridation: Just the Facts

event marketing

Learn about this topic in these articles:

Jobs

  • Steve Jobs
    In Steve Jobs: Insanely great

    …as the archetype of “event marketing.”

    Read More