Grichka Bogdanoff, French television presenter and scientific essayist (born 1949)

Igor Youriévitch Bogdanoff and Grégoire "Grichka" Youriévitch Bogdanoff, alternatively spelled Bogdanov, were French television presenters, producers, and essayists who presented a variety of programmes in science fiction, popular science, and cosmology. The brothers – identical twins – were involved in a number of controversies, the most notable being the Bogdanov affair. It brought to light how they received Ph.D. degrees based on largely nonsensical physics papers that were nonetheless peer-reviewed and published in reputable scientific journals. In their later years, they were also the subject of numerous internet memes, particularly in the cryptocurrency community.

December 28 is the 362nd day of the year in the Gregorian calendar; three days remain until the end of the year.