19-year-old Broc Brown from Michigan is growing at a phenomenal rate - 6 inches (15 cm) a year - and will soon become the tallest man in the world if it doesn’t slow down. He is now 7ft 8ins (2 meters 34 cm).
His mother, Darci said: “I’d say Broc was around 5ft 2ins (157 cm) when he was in kindergarten.
“When he got into middle school he was around 6ft tall and by high school he was 7ft (213 cm) tall – he could easily grow six inches in a year.
“It’s a genetic disorder and there’s nothing that can stop him from growing – I don’t know if he will ever stop.”