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Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson

Vietnam War Timeline

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

Bolshoy Ice Dome during ice hockey Men's Prelim. Sochi 2014 XXII Olympic Winter Games

7 Ways Hosting the Olympics Impacts a City

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

number zero, 0 balloon

Is Zero an Even or an Odd Number?

Ancient Mayan Calendar

Our Days Are Numbered: 7 Crazy Facts About Calendars

platform

vessel

Learn about this topic in these articles:

undersea exploration

In undersea exploration: Platforms
Undersea exploration of any kind must be conducted from platforms, in most cases, ships, buoys, aircraft, or satellites. Typical oceanographic vessels capable of carrying out a full complement of underwater exploratory activities range in size from about 50 to 150 metres. They support scientific…
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