Time Travel in a 1928 Chaplin Film?
Michio Kaku is a futurist, popularizer of science, and theoretical physicist, as well as a bestselling author and the host of two radio programs. He is the co-founder of string field theory (a branch of string theory), and continues Einstein’s search to unite the four fundamental forces of nature into one unified theory. He holds the Henry Semat Chair and Professorship in theoretical physics and a joint appointment at City College of New York and the Graduate Center of C.U.N.Y. He is also a visiting professor at the Institute for Advanced Study in Princeton and is a Fellow of the American Physical Society.
Kaku launched his Big Think blog, "Dr. Kaku's Universe," in March 2010.
Recently, I've been getting calls from the media, asking me about the 1928 Charlie Chaplin movie which shows a person talking into what appears to be a cell phone.
How can this be? Is this person a time traveler?
Let me make a few remarks:
To actually build a time machine, you need positive and negative energy on a cosmic scale. So don't think that any inventor is going to build a time machine any time soon.
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