Sir Isaac Newton is often considered to be the world’s finest scientist. Born in Lincon in 1642, he studied at Cambridge and went on to discover the law of gravitation, and invent the first reflecting telescope. He was knighted n 1702 and died in 1727. He is buried in Westminster Abbey. He wrote his masterpiece, Principia, in 1687.
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थॉमस अल्वा एडिसन एक अमेरिकी अविष्कारक और व्यापारी थे। उन्होंने अनेक यंत्र एवम युक्तिया विकसित …