The answer is that they do. There are rather well-authenticated cases spanning a wide variety of "physical effects." R ...

The number of documented general sightings in the modern age numbers approximately 120,000, of which 20,000 have been described as landings. Numerous surveys and opinions polls conducted over the last ...

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From the witness: "We heard someone yelling 'There is something hovering over the ship!'... As we looked up, we saw a large, glowing sphere.... It made no sound that I could hear. The light coming ...

Location: Earth orbit, enroute to Soviet Solyut 6 Space Station, In April of 1979, Cosmonaut Victor Afanasyev lifted off from Star City to dock with the Soviet Solyut 6 space station. But while en ...

"A UFO moved silently out from the right just above the tree line. Its speed was approximately 5 miles an hour, its size, 50 feet diameter. The UFO stopped directly in the middle of the gravel road ...

On September 14, 1957, Ibrahim Sued, a columnist for the Rio de Janeiro newspaper O Globo, printed a letter which he had received, concerning a UFO incident. Accompanying the letter were three small ...

In 1492, Christopher Columbus and Pedro Gutierrez while on the deck of the Santa Maira, observed, "a light glimmering at a great distance." It vanished and reappeared several times during the night, ...

One of the most mysterious stories of a crashed UFO with alien bodies preceded the well know Roswell events by some six years. Reverend William Huffman was summoned to pray over alien crash victims ...

The color video footage, which lasts for a total of two minutes and fifty-five seconds, was apparently smuggled out of the secret Groom Lake "Area 51" facility in Nevada by a man referring to himself ...

The sighting of strange objects in the sky may actually predate the emergence of modern man. Perhaps the earliest depiction of cylindrical objects resembling spacecraft, with what might be their ...