He's Japanese (possibly other Asian descent). I think he is one of the physicists who came up with string theory. I think he has/had a television series on a cable network in the USA, not sure what it is/was about. His name is something like, I don't know, Mikio Chakatoa and he's got long grey hair. I can't find him anywhere on the internet. So what's his name and what's the television show called?
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I believe your thinking of Michio Kaku, I might be mistaken. Although he doesnt have his own tv show, he is a guest on alot o science shows like through the wormhole with morgan freeman and other science channel shows. hope it helps!