Professor Dr Üner Tan, born in 1937, is a Turkish neuroscientist and evolutionary biologist, best known for his discovery in 2005 and study of human quadrupedalism with a cognitive decline (Uner Tan syndrome). He taught at various universities in Germany and Turkey until his retirement in 2004. Today, he is working as a senior scientist at Cukurova University in Turkey. Tan is the honorary member of the Turkish Academy of Sciences, and has won numerous awards, including the Science Award from the Turkish Scientific and Technical Council, the Einstein and Nobel Medals for Science and Peace from the Albert Einstein Foundation in the USA, and the Gold Record for Brain Research at the American Biographical Institute. Tan's scientific studies include the physiology and pharmacology of the spino-cerebral motor systems, reflexes in human neonates, cerebral lateralization, intelligence, handedness, finger-length patterns, blood sex hormone levels, and Uner Tan syndrome (quadrupedalism and cognitive decline). Tan has published around 200 papers with nearly 2000 citations since 1966.