Accelerating the pace of engineering and science.
Ali's prose ranged from quick couplets used to taunt opponents to short poems and moving tributes.
During the fight that introduced him to the world, Ali flaunted an idiosyncratic style that matched his famously fast wit.
Young fighters are feeling the impact of hometown hero Muhammad Ali – inside the ring and out.
One day, author Davis Miller worked up the courage to knock on Muhammad Ali's door. That was the beginning of a lifelong friendship.
Born Cassius Clay, Ali converted to Islam in 1964, and later became a conscientious objector during the Vietnam War.
The boxer refused the draft, which cost him his title, but galvanized radicals across the country.
Thousands have flocked to Ali's boyhood home, as well as to the city's Muhammad Ali Center.