He originated a fictitious and pseudoscientific history called New Chronology, based on works of Russian-Soviet writer Nikolai Alexandrovich Morozov.

In 1959, his family returned to Eastern Ukraine and settled in the city of Luhansk, where Fomenko attended Secondary School No.

Also in 1959, the magazine Pionerskaya Pravda (Russian: Пионерская правда, Pioneer Truth) published his first known science fiction story, "The Mystery of the Milky Way".

Fomenko has served as the editor of several Russian-language mathematics journals and is a member of many councils overseeing dissertations in his field.

Fomenko claims that he has discovered new empirico-statistical methods and their application to determine that many historical events do not correspond with the dates on which they are supposed to have occurred.

Fomenko is the author and sometimes co-author of several books the analysis of historical chronicles as well as the chronology of antiquity and the Middle Ages.