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Directory
References
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Baseball laying in the grass. Homepage blog 2010, arts and entertainment, history and society, sports and games athletics
10 Greatest Baseball Players of All Time
Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)
7 of the World’s Deadliest Shipwrecks
The Colosseum, Rome, Italy.  Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World
Estimated battle casualties, Normandy invasion, World War II. WWII, D-Day
Estimated Battle Casualties During the Normandy Invasion and Campaign to Liberate Paris (June–August 1944)
Turtle, tortoise, reptile. Uses assets 88582 & 89606
What’s the Difference Between a Turtle and a Tortoise?
Illustration for Demystified "How Dangerous is Quicksand"
How Deadly Is Quicksand?
Shadow of a man holding large knife in his hand inside of some dark, spooky buiding
7 of History's Most Notorious Serial Killers

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physics

Learn about this topic in these articles:

combustion

  • The science behind striking a match
    In combustion: Premixed flames

    …zone is usually called the flame front.

    Read More
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