
What are UFOs--are they military aircraft, tricks of the light, or are they alien spacecrafts visiting Earth? For hundreds of years, people have been trying to make sense of many UFO sightings. This book discusses that exploration with a combination of logical scientific explanation...

What are UFOs--are they military aircraft, tricks of the light, or are they alien spacecrafts visiting Earth? For hundreds of years, people have been trying to make sense of many UFO sightings. This book discusses that exploration with a combination of logical scientific explanation...