Know what has been discovered. Their photos were also given.

[chunna]

Who invented the mobile phone?
Martin Cooper
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Do you discover the laptop?
Bill Magrors
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Who discovered the pen?
John Loud
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Who invented the robot?
George Charles Devoll
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Discover the motorcycle
Who?
Gottlie Delmar
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Who invented the pistol?
Samuel Coult
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Discover the helicopter
Who?
Igor Sikorsky
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Who invented the power?
Michael Faraday
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Who invented the rocket?
Robert Gordard
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Discover the microphone
Who?
Abraham Horoscope
Abraham Horoscope