When was the first lie detector made?

Answer The first modern lie detector was fashioned in 1921 by John Larson, a forensic scientist working for the Berkeley Police Department. Known as a polygraph, it recorded a person's blood pressure, pul... Read More »

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When was the first lie detector invented?

The polygraph, was invented in 1921 by John A. Larson. Larson was also the person who named the machine a "polygraph." This, the first lie detector machine, measured both respiration and blood pres... Read More »

What does it mean when first alert smoke detector beeps 3 times?

According to a First Alert user's manual, three beeps or chirps indicate a possible malfunction in the unit that requires immediate replacement. These beeps are often accompanied by simultaneous LE... Read More »

When was YouTube first like made And is the first ever video on it still on it If so what is it?

It's called "Me at the zoo."…The first video on YouTube, uploaded at 8:27PM on Saturday April 23rd, 2005. The video was shot by Yakov Lapitsky at the San D... Read More »

What was the first television channel When was it first made?

In 1926, John Logie Baird transmitted the very first television picture from one room to another. By 1927, he used telephone wires to successfully send a moving image from London to Glasgow and in ... Read More »