Disasters and breakthroughs in the progress of civilization capture our attention and prepare us to understand our world in new ways.
One way a tsunami can develop is when the energy from an earthquake below the ocean is transferred to the ocean surface above the quake's epicenter. This brief animation depicts that reaction. NOAA tells us more about how the theory of plate tectonics is involved in the chain-of-events: Major tsunamis are produced by large earthquakes and frequently occur in the Pacific where dense oceanic plates slide under the lighter continental plates. When these plates fracture, they provide a vertical movement of the sea floor that allows a quick and efficient transfer of energy from the solid earth to the ocean. Disasters often result from earthquake-caused tsunamis.
Although the Soviet Union never acknowledged that its policies caused the Ukrainian famine of 1932-33, Russia acknowledged it in 2003.
Refusing to grant access to individuals who can see how the Ukrainian people are starving, Soviet officials assure the world, and their own countrymen...
As Ukrainians starve, the Soviet government covers-up the disaster occurring in Ukraine by selling more and more grain to other countries.
Stalin's orders to take Ukrainian grain, between 1932-33, cause people throughout Ukraine to starve.
The Bolsheviks change their sharing policies to taking policies not long after consolidating their power.
Phosphate mining, in South Carolina, was once the most-dominant in the world. This twenty-year position of prominence ended due to a variety of factor...
American children held jobs in many industries, including the cotton industry during the early 20th century. This girl was a spinner at a South Caroli...
Woodrow Wilson, about to be inaugurated as U.S. President, learns that American women are marching in protest against his stance on female voting righ...
Henry Bliss Northup was the man who rescued Solomon Northup - whose slave name was ''Platt Hamilton'' - from slavery.
The political campaigns, leading-up to the presidential election of 1884, included lots of arguing politicians.
Although the Library of Congress has a treasure trove of pictures, documents, audio/visual clips and other primary and secondary sources, it is not ea...
On the 8th of December, 1941 - the day after Pearl Harbor was bombed - Americans received their up-to-date news from the radio.
Churchill tried repeatedly to convince FDR to enter the war.
Winston Churchill became Prime Minister on the 10th of May, 1940.
On the 4th of June, 1940, Winston Churchill addressed Parliament.
What are the factors leading to Napoleon's defeat at Waterloo on June 18, 1815?
It's June 13, 1935 and Jim Braddock - a 10 to 1 underdog - stuns boxing fans everywhere when he defeats the reigning champion, Max Baer.
Making her point by breaking bottles of alcoholic beverages, Carry Nation becomes a temperance leader.
Gone with the Wind became one of the best-selling novels and movies of all time.
Margaret Mitchell named Scarlett O'Hara after looking through books of Irish literature.
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