Researchers are publishing their research papers in research journals. Some explanation of the natural phenomenon is considered only if other researchers with the same experiment come to the same or approximate results. Often the confirmation of some explanation is waiting for a few decades.
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Question ofAbu Nasr Al-Farabi- 
					
Iran
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Iraq
 
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Question ofMartin Gardner- 
					
USA
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England
 
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Question ofBill Nye- 
					
USA
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England
 
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Question ofAvicenna- 
					
Kazahstan
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Uzbekistan
 
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Question ofBlaise Pascal- 
					
France
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Switzerland
 
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Question ofCarl Sagan- 
					
Ireland
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USA
 
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Question ofBrahmagupta- 
					
India
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Pakistan
 
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Question ofHenrietta Swan Leavitt- 
					
Scotland
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USA
 
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 mrki
							mrki
					 
					
He man! I got 4 out of 8
Next one will be much better.
Guess where the scientist was born – Quiz 3
You got 8 out of 8 right!
Perfect. You rock!
Wow! Great quiz.
You got 4 out of 8 right!
Not so bad
You will be better at next quizz.