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Why our nails turn blue during winter?

In Body Trivia
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Why our nails turn blue during winter?
View Answer
Nails turn blue in cold weather because our blood vessels constrict in response to a low temperature to minimize heat loss.
This results in less supply of RBC (which carry oxygen) and our blood appears blue. It is more apparent in nails due to their transparency.
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Eternals Quiz

In Superhero Trivia, Movie Trivia, Trivia Quizzes
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Eternals Quiz

The Marvel Cinematic Universe (MCU) is back with another fantastic movie. Eternals are immortal beings living on the Earth in secrecy for thousands of years. However, they are forced to reunite against mankind’s most ancient adversaries, the Deviants, due to unforeseen tragedies. Are you a big fan of MCU’s most recent release? Challenge yourself or play with friends! Test your knowledge with this Eternals Quiz!

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What was the purpose of Medieval castles?

In History Trivia
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What was the purpose of medieval castles?
View Answer
Safety and protection.
The castles were basically built during the wars of the late Middle Ages for the purpose of safety/protection. The castles originally were constructed simply, but due to the need for protection rose, they became much more sophisticated. They were built as homes of kings and nobility. The noble classes, such as royalty and crucial public figures, can be protected from unwanted intruders.
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