Jacques Vallée witnessed a UFO over his home in France in 1955, and it impacted his life. A top figure in UFO studies for decades, he said he believes UFOs exist but is still unsure of what they are.
Before Jacques Vallée would become an astronomer and author, he witnessed a flying saucer at 15 years old. His mother's scream alerted him to run outside where he and his mother watched a gray disc hovering above the town's cathedral. Later, Jacques' friend also claimed to have seen the same object through a pair of binoculars and drew a picture that matched what Jacques' had seen.
Many years would pass but Vallée's wonder with space remained. He became an astronomer and worked in both France and the United States. His career lead him to investigate witnesses of UFO encounters. Vallée wrote books compiling encounters and created databases.
Despite opposition from other ufologists, Vallée offers a hypothesis in which extraterrestrials could be "potentially from anywhere and could be multidimensional beyond space-time; thus they could coexist with humans, yet remain undetected."