The London Beer Flood

The London Beer Flood

Transcript Early 19th century London was a dangerous, dirty, dingy place with tons of poverty and a lot of drinking.  Alcoholism was common and excessive drinking, especially amongst lower-income people in London, was the norm, not the exception.  All of that alcohol had to be produced, which meant lots of breweries and lots of beer. …

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Base Units of Measurement

Base Units of Measurement

Transcript Every day we are constantly using measurements. We have ways of measuring distance, temperature, time, light, pressure, energy….everything. Yet, why do we measure everything the way we do? Why is a second, a second, and why is a meter, a meter?  Learn more about why our units of measurement are the way they are …

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Mitochondrial Eve

Mitochondrial Eve

Transcript On January 1, 1987, a paper was published in the journal Nature which rocked the world of anthropology.  Researchers Allan Wilson, Mark Stoneking, and Rebecca Cann used the then-new science of genetic analysis to analyze the DNA in human mitochondria.  What they found was evidence that humans on Earth can trace their ancestry back …

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The History of the Elevator

The History of the Elevator

Transcript Some of the things we use every day were invented in the distant past. Other things were invented quite recently.  However, there is a category of inventions that have been known forever, but no one ever had any practical use for it until recently.  Learn more about the elevator, and how it helped create …

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Space Junk

Space Junk

Transcript In 1957, Sputnik was launched into orbit as the world’s first artificial satellite.  Today, 64 years later, there are more than 1,000,000 objects larger than 1 centimeter floating around the Earth.  Almost all of those objects in orbit were not put there intentionally. Learn more about space junk, the problem, and possible solutions, on …

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Roman Decimation

Roman Decimation

Transcript You are probably familiar with the term decimation. The word is usually used in English to mean “to cause great destruction or harm”.  However, to ancient Rome, the word had a very different and very specific meaning.  It was one of the most devastating and brutal forms of punishment that the military could inflict.  …

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A History of the Theremin

A History of the Theremin

Transcript You are probably familiar with the four basic types of musical instruments: strings, woodwinds, brass, and percussion.  However, is it possible to have an instrument that doesn’t fit into one of these families?   In the early 20th century, Russian inventor Leon Theremin came up with an instrument that doesn’t fit into any family and …

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