When Were Fixed-time Traffic Lights Invented?
When Were Fixed-time Traffic Lights Invented? Fixed-time traffic lights were invented in the United States...
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Which Poisonous Gas Has a Sweet Smell?
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Would You Prefer an Electric Vehicle?
Most recent articles
What Is Esperanto?
What Is Esperanto? Esperanto is a language created by Ludovic Lazarus Zamenhof (1859-1917), a Jew who was...
Why Does New York Have so Many Skyscrapers?
Why Does New York Have so Many Skyscrapers? There are so many skyscrapers in New York because these enormous...
When Were Christmas Cards First Sent?
When Were Christmas Cards First Sent? The first Christmas card was designed in England on 1st May 1843 by...
Where Does Velvet Come From?
Where Does Velvet Come From? Velvet comes from silk, but there are many imitations made from cotton and...
Where Is the Bridge of Sighs?
Where Is the Bridge of Sighs? The Bridge of Sighs (Ponte dei Sospiri) is a bridge located in Venice,...
What Is the Origin of Santa Claus?
What Is the Origin of Santa Claus? The jolly old man with white whiskers who brings children toys in his...
Who Are Sherpas?
Who Are Sherpas? Sherpas are a hardy people living in a rugged, mountainous region of north-east Nepal, of...
When Did Yoga Start?
When Did Yoga Start? The origins of yoga are a matter of debate. There is no consensus on its chronology or...
Where Do Raisins Come From?
Where Do Raisins Come From? Special varieties of grapes are dried, and are then called “raisins”, the French...