Interesting facts

trr1

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trr1

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There’s a tree in Georgia that owns itself.

 

trr1

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7 New Year’s Customs From Around the World

 

trr1

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It can take two weeks to make one jelly bean.

 

trr1

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In 1969, the Army Corps of Engineers turned off part of Niagara Falls.

 

trr1

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Ancient Egyptians shaved their eyebrows as a sign of mourning when their cats died.

 

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Organs Your Body Can Live Without

 

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Chickens might be among the closest living relatives of the Tyrannosaurus rex.

 

trr1

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For decades, directors used the pseudonym “Alan Smithee” when they didn’t want their real names on a film.

 

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7 Egg-Cellent Facts About Eggs

 

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Amazing Facts About Alcatraz

 

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Modern doorknobs weren’t invented until 1878.


Yes, the modern doorknob was invented in 1878 by Osbourn Dorsey, an African American inventor. Dorsey's doorknob was a significant improvement over existing doorknobs because it included an internal door-latching mechanism.

Explanation
  • Before Dorsey's invention, doors were opened and closed using latches, handles, bars, or leather straps.

  • Dorsey's doorknob was patented on December 10, 1878.

  • It took several years for most people to adopt Dorsey's doorknobs.

  • The first American metallic doorknobs were made in the 1830s.

  • The spindle was introduced in the late 1800s.

  • Doorknobs with ball bearings were introduced around 1900.

  • Today, doorknobs are made from many materials, but brass is the most popular
 

trr1

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