The great theories of physics seen through the controversies they provoke. Quantum physics and general relativity, the two pillars of modern physics, are a source of fascination to many. Difficult subjects tackled in their historical context and without scientific tools.
Most reported sightings of UFOs turn out to be errors, optical illusions, hallucinations, and even practical jokes. But five per cent of all reported cases are more difficult to dismiss. According to the author, the unidentified objects may be clandestine terrestrial aircraft prototypes or secret weapons launched by the major industrialised nations, particularly the United States. Should the mysterious sightings be attributed to UFOs or to UFWs (Unidentified Flying Weapons)?