Remove 3 letters from this seq...
[6370] Remove 3 letters from this seq... - Remove 3 letters from this sequence (REHCROCRD) to reveal a familiar English word. - #brainteasers #wordpuzzles - Correct Answers: 40 - The first user who solved this task is Nasrin 24 T
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Remove 3 letters from this seq...

Remove 3 letters from this sequence (REHCROCRD) to reveal a familiar English word.
Correct answers: 40
The first user who solved this task is Nasrin 24 T.
#brainteasers #wordpuzzles
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Ballpen in space

When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity.
To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 C.
The Russians used a pencil.

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Thomas S. Kuhn

Born 18 Jul 1922; died 17 Jun 1996 at age 73. Thomas Samuel Kuhn was an American science historian and science philosopher was a MIT professor, noted for his highly influential The Structure of Scientific Revolutions (1962). He held that science was not a steady, cumulative acquisition of knowledge, but it is “a series of peaceful interludes punctuated by intellectually violent revolutions.” Then appears a Lavoisier or an Einstein, often a young scientist not indoctrinated in the accepted theories, to sweep the old paradigm away. Such revolutions, he said, came only after long periods of tradition-bound normal science. He pointed out that scientific research and thought are defined by “paradigms,”or trusted theories, concepts, methods and experiments. Such paradigms are accepted by scientists, who continue to extend, refine, explain and measure results until they meet an problem that cannot be resolved within the established framework. Such anomaly or contradiction eventually requires an intellectual revolution, such as the paradigm shifts from Ptolemaic cosmology to Copernican heliocentrism. “Frameworks must be lived with and explored before they can be broken.”
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