I watched a couple of Clay/Ali fights on ESPNCL with my son the other day. He was amazed to find that names like Frazier, Foreman and Ali were all fighting in the same time period.
I can't even name a heavyweight today. I hated Ali when I was a kid, because he was such a blowhard. Looking back, though, he was really a great athlete.
rent or buy the documentary of his fight with foreman.