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Symmetries are an ideal for every physicist, and a means for gaining knowledge about the laws of nature. But do they really lead us to the Truth? Or is thinking in symmetries misleading scientists? Physicist Peter Ripota explores this question, with remarkable results.

Would you like to travel into your past, change some events und emerge in the present as another being? Is that really possible? The infamous grandfather-paradoxon - I kill my grandfather, therefore I cannot exist, therefore I cannot kill my grandfather, therefore I can exist, therefore ... - seems to prevent travels into the past. But physicist and science-fiction-reader Peter Ripota found a solution to this paradoxon. Based on ideas by Richard Feynman and John A. Wheeler, he schows: Time travels are theoretically possible, even into the past. But will they ever happen? And can you really change your destiny?

How far is it till infinity? Physicist Peter Ripota explores the way from the smallest infinite number (omega) to the largest (OMEGA), in words and diagrams. Besides, he explores  questions like: Is God really infinite? Are some numbers non-interesting? Is there a "jewish mathematics"?

What follies do physicist accept? Physicist Peter Ripota explores three physical paradigms: The relativity theories (there are two), the big bang hypthesis, and the consquences of modern quantum physics. He shows how these theories are riddled with paradoxes, antinomies and downright nonsense. But Ripota is no fanatical anti-pyhsicist. He contributes many anecdotes, satires and witty illustations.