Sergei Filippov

Sergey Filippov was born in Saratov in a working class family. Father was a locksmith, and mother a dressmaker. At school, Sergei Filippov did not study well, and in high school he even became known as a bully. In a chemistry lesson in the absence of a teacher, he mixed hydrochloric acid with iron filings, added a couple of reagents. After such an experiment, a terribly pungent smell spread…