Research on Zana began in 1962, when Moscow biologist
Alexander Mashkovtsev and a young
Boris Porshnev (who would later become a prominent figure in Soviet
cryptozoology) traveled to Tkhina and collected local stories about her. They were told that Zana and her son Khwit were both buried in the Genaba family cemetery. Porshnev made a number of attempts to locate Zana's grave, but was unsuccessful. In 1971, he decided to exhume Khwit's remains, as his grave was still clearly visible. The anthropologists who analyzed the skull found that she probably died in her 40s and was possibly of sub-Saharan African descent based on her features. Because they did not think Khwit had African ancestry, the skull was disregarded as being his mother despite their resemblance. In 2021 a team sequenced the full genomes of both Tkhina-71 and Tkhina-75, and conclusively identified Tkhina-75 as Zana. They found that Zana was of majority eastern African descent, with possible western African admixture. Khwit was of mixed African and Caucasian descent. They hypothesize that Zana could have had
congenital generalized hypertrichosis, a disorder which causes excessive hair growth all over the body as well as
intellectual disability and dismorphic facial features, which could explain her unusual appearance and behavior. Zana's African origin has been connected to the
Afro-Abkhazians, a small African-descended community historically found in a number of villages in Abkhazia whose origin is disputed.
Cryptozoology During her life, locals believed Zana was an . Zana's story was first published in Boris Porshnev's 1968 work "The Struggle for Troglodytes", which describes his views on and search for relict hominids. In 1974 Porshnev and
Bernard Heuvelmans published a book titled ("Neanderthal Man is still Alive"), in which they argued that Zana was a surviving
Neanderthal. Cryptozoologists such as
Myra Shackley, Dmitri Bayanov, and Igor Burtsev have also promoted the Neanderthal theory. == In popular culture ==