Does anyone know this man?

199 1 year, Ivan Hack, a Belarusian who had been missing for seven years, suddenly appeared in the city where he lived, unkempt, unshaven and naked, which surprised his neighbors. Later, he wrote a book called The Adventures of Ivan Huck, which described his experience of living with a female savage for seven years and having a descendant of a little savage. After the publication of this book, it caused a sensation at home and abroad. 1In June, 1994, Sinkov, an academician of the Russian Academy of Sciences and a wildlife biologist, Wilson, a professor of biology at Cambridge University in England, Hans, an American anthropologist, and Li Si, a female reporter of Time magazine in the United States, formed an expedition to search for savages in the great forests of Sautonie along the route described in Ivan's book. This leads to a fascinating and wonderful description of the savage discovery process and savage lifestyle.