Space
Explore the vast reaches of space and mankind’s continuing efforts to conquer the stars, including theories such as the Big Bang, the International Space Station, plus what the future holds for space travel and exploration.
The Zoo Hypothesis: Are Aliens Watching Us Like Animals in a Zoo?
Communicating With Aliens Is Hard. Communicating With Alien AI Could Be Harder
Could Dark Matter Spawn 'Shadow Life'?
What Is a Harvest Moon?
The Mysteries of Mercury Retrograde Unveiled: A Cosmic Phenomenon
A Comprehensive Guide to the Layers of the Earth
10 Best Ideas for Interplanetary Communication
How can the moon generate electricity?
How Terraforming Mars Will Work
What Really Happened to Yuri Gagarin, the First Man in Space?
Apollo 11 One Giant Leap For Mankind
How Sputnik Worked
Moon's Glass Beads Hold Billions of Tons of Water
Quiz: Apollo 11, the First Moon Landing
Who was James Webb?
The Fastest Fictional Spaceships
10 Fictional Spacecraft We Wish Were Real
How Lunar Rovers Work
Learn More / Page 4
In recent years, Saturn has overtaken Jupiter as the planet with the most moons in our solar system. How many does it have and could it have even more?
A magnetar is a neutron star with a super-strong magnetic field. Astronomers consider them among the scariest objects in the universe, but why?
You might call it a Christmas miracle. Jupiter and Saturn will align so closely they may look like a double planet. The last time we saw this was in 1226.
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The Quadrantids are a short but powerful meteor shower that shows up in early January. How can you glimpse it?
Winter is the perfect time to look for Orion's Belt in the Northern Hemisphere. If you're new to stargazing, we'll show you how to find it.
People around the world watched as Neil Armstrong touched the moon and declared, "That's one small step for man; one giant leap for mankind." But how did we put a man on the moon?
Spring Heeled Jack is a legendary English character. He was a mysterious a Victorian-era murderer, leaping from rooftop to rooftop, leaving a trail of tragedy in his wake. Read why some think Spring Heeled Jack may have been an alien humanoid.
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Hollow earth theory was the brainchild of John Cleves Symmes, who sought to explore Earth's center, where UFOs supposedly come flying in and out. Read why some believe UFOs live inside the Earth.
The Oz Factor is a sensation that UFO witnesses experience. Learn where the term "Oz Factor" came from, and what the experience is like.
John Philip Bessor originally theorized that UFOs could be a form of space animal. These organisms may even be carnivorous. Learn more about space animals and the UFO critter theory.
Both skeptics and believers spend time researching UFO reports and explaining UFOs as natural or supernatural events, whether meteor or balloon or optical allusion or good old-fashioned mystery. Read more about explaining UFOs.
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Does the government maintain secret contact with extraterrestrials? How long have they been communicating? Learn about theories of UFOs and government secrecy in the CIA and the NSA.
Since humans have observed strange phenomena, they have tried to explain them. UFO theories vary as widely in their credibility as in their imagination. Learn about theories of UFOs, aliens, spaceships, and the government.
In 1897 Alexander Hamilton reported a cow abduction by a UFO that appeared at his farm in Kansas. How did he fool people for half a century, and even get the made-up story in the newspaper?
Richard Sharpe Shaver was a controversial UFO storyteller promoted by magazine editor Ray Palmer in the 1940s. Shave wrote amazing stories about aliens called deros and teros. Some called him a crackpot; some called him a prophet.
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Bob Lazar claimed to have worked in the S-4 section of Area 51. On that top-secret Nevada research base, he claimed to see anti-gravity reactors and flying saucers in person. How truthful were his extravagant tales?
The Maury Island UFO incident was a UFO encounter concocted by Fred Crisman and Harold Dahl. Even after they confessed, this tale remained widespread, living up to its reputation as the "dirtiest hoax in UFO history."
Mon-Ka is a Martian, rumored to have been communicating with the Earth since the mid-1950s. Dick Miller first popularized the hoax in London, and the story spread. Read how Mon-Ka's fooled the city of Los Angeles.
George Adamski preached an interplanetary gospel based on contact with UFOs and aliens. Though serious investigators scoffed, he earned wide attention. Read about George Adamski and his "Space Brothers."
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A look at the night sky at any time of year will reveal a faint band of light stretching across the sky -- our solar system's home, the Milky Way. How much do we really know about it?
The Straith Letter was fabricated by two UFO writers. The letter alleged U.S. State Department had significant evidence about extraterrestrial life. Read how the fake letter from a government official fooled UFO contactee George Adamski.
Howard Menger said he was a UFO contactee, and even made a free energy device based on UFO science. Other contactees have made similar claims and dubious business ventures. Read about Howard Menger and other UFO contactees.
Have aliens arrived on Earth naked? Two contactees claim that a naked alien has come to visit our planet in last century. How are their stories similar and how are they different?
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In 1884 a UFO crash in Nebraska sent flaming bits of machinery flying through the air and startled residents. The long, cylindrical ship later disappeared when it rained. Read more about the 1884 Nebraska crash.
Star People are those who, according to Brad Steiger, live on Earth to prepare for the arrival of our alien relatives. Star People have unique traits that set them apart from ordinary humans. Read more about Star People.