During a battle with an enemy called the Iron Nail, the Super Soldier Serum within Rogers's body was neutralized, causing him to age rapidly to match his chronological age of over 90 years.
For example, a six-year-old child who passed all the tasks usually passed by six-year-olds—but nothing beyond—would have a mental age that matched his chronological age, 6.0. (Fancher, 1985).
For example, a 6-year-old child who passed all the tasks usually passed by 6 year-olds—but nothing beyond—would have a mental age that exactly matched his chronological age, 6.0. (Fancher, 1985).
He worked as a child actor in the early 1990s, often playing roles much younger than his chronological age, and as late as 2002 he was still playing teenagers while in his mid-20s.
As of his adventures in The Lost Colony, Artemis has exchanged one eye with Holly Short as a result of a botched re-materialization and now possesses one blue eye and one hazel eye, and a time travel in The Time Paradox aged him to his chronological age of 18 but then back again upon his return to his own time.