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Question: How old is the oldest man on Earth at the time being?

Answer: Emiliano Mercado Del Toro (Puerto Rico), born in Cabo Rojo on August 21, 1891, became the oldest fully authenticated man residing in the world on 17 January 2005 at the age of 113 years 149 days.

Currently living in Isabela, Puerto Rico, he is also the oldest living veteran, having been called up in 1918 by the US Army. A non-combat veteran, he was two months into training when World War I ended on 11 November 1918.