The trip had all the makings of a boring car ride—until the couple saw mysterious lights approaching from the sky.

One night in 1957, Antônio Vilas Boas was plowing his field in rural Brazil when he saw mysterious red lights flying through the sky. What he presumed was a spacecraft landed in a nearby field.

New Hampshire is famous for two incidents in the 1960s involving UFOs. One is known as The Exeter Incident, when a hitchhiker and other witnesses say they saw a large flashing object in the sky.

Here’s how a report on alien abductions in the United States begins: “Most alien abduction stories begin quietly — a strange light, a missing moment, something that feels off.” Sounds like something ...