Ufo sightings have been the topic of debate for over 200 years.these are well documented events and their findings. But are they real? You decide. The evidence presented within this book will show a clear, unbiased description of these events and what some people believe to be the most realistic evidence of another life, another world. It's this disregard for our human understanding of the laws of nature that gives them an otherworldly, almost supernatural quality. It's not hard to imagine why so many people worldwide believe these ufos to be alien spacecrafts-how else would one explain their ability to perform maneuvers that no human vehicle or pilot could ever dream of doing? That doesn't stop experts from forming their educated guesses, however. A wide range of explanations are proposed to explain away these flying phenomena whenever they appear. Weather balloons. Ball lightning. Optical illusions. Malfunctions of radar and cameras. Much has been said about the possibility of alien life, but very little has been proven. The subject remains one of the most talked-about, yet enigmatic subjects in the modern world. Do aliens exist? Have they been to earth? Is there any way to get to the bottom of this riddle?