Nikolay Nikolayevich Semyonov was born on April 15, 1896 and died on September 25, 1986. Nikolay Nikolayevich Semyonov would have been 90 years old at the time of death or 116 years old today.
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Nikolay Nikolayevich Raevsky was born on September 25, 1771 and died on September 28, 1829. Nikolay Nikolayevich Raevsky would have been 58 years old at the time of death or 240 years old today.