You're very young. Some people age fast. Especially when they're living with danger the e
way he way.
BUT, interesting thing here, he was born in Kiev.
"Zelenko was born in Kyiv in 1973, and moved to the US at age 3. Zelenko is married and the father of eight children."
https://www.jewishpress.com/news/obituaries/dr-vladimir-zelenko-passed-away/2022/06/30/