As science scratches below the surface of the physical universe, it turns up more & more mysterious matters. A very small ghost, much smaller than an electron, now haunts modern physics. Its name, for want of something better, is the "neutrino." No one has ever seen a neutrino, or any trace which one has left behind it, but physicists are pretty certain that neutrinos are real. Just possibly, they may be the most important things in the physical universe.
In the current issue of Physics Today, Dr. George Gamow tells why he thinks that...
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