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
The harvest moon is the full moon closest to the autumnal equinox, typically in late September or early October in the Northern Hemisphere.
Unlock the mysteries of Mercury Retrograde, its impact on astrology, and how to navigate its cosmic waves for personal growth.
By HowStuffWorks
Delve into the Earth's layers: crust, mantle, outer core, and inner core. Discover the secrets beneath our feet and the dynamic processes at play.
By HowStuffWorks
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Explore the mysteries of the outer planets: Jupiter, Saturn, Uranus, and Neptune. Dive deep into their atmospheres, moons, and unique phenomena.
By HowStuffWorks
Nothing lasts forever. Does that include our home planet, too?
The moon is covered with little glass beads, each containing a tiny bit of water, which could add up to huge reserves for future missions.
Sometimes hundreds of people armed with high-tech cameras can make amazing scientific discoveries, as in the case of STEVE.
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March's full moon is called the worm moon for an unusual reason. What are some other names for the March moon and when can you see it?
Every 24 hours, Earth makes a full rotation on its axis. But why does Earth spin in the first place?
Researchers at Australian National University studied 5,000 star-eating behemoths to find out.
January's moon is called the wolf moon, but it's also known as the center moon and the freeze up moon (among other names). Here's why.
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Is it possible that we are not alone in the universe, but are just like animals in a zoo to the aliens who are watching us?
By Robert Lamb
Stars are giant nuclear fusion reactors, and we wouldn't exist without them. Find out how much you know about these twinkling lights with our quiz.
All of the planets in the solar system are named for Greek gods, except Earth. So where did the name come from?
By Mark Mancini
He stood just 5 feet, 2 inches. But Gagarin cast an enormously long shadow in space exploration, both for his achievements and his mysterious death.
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We’re celebrating the 50th anniversary of Apollo 11’s historic journey to the moon.
It's been more than 50 years since humans first landed on the moon. Pull up a lunar module and let's see how much you know about Neil Armstrong, Buzz Aldrin, Michael Collins and the adventure that immortalized them.
By Mark Mancini
Why do planets in the solar system all seem to be round? Why not cylindrical? Or even cube-shaped?
By Mark Mancini
So what does that mean for good ol' Earth someday?
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In the darkness of space, we’re comforted by our moon, the circular inspirer of song lyrics, poetry, and wannabe astronauts. But what do you really know about the moon and its history? Take this quiz to find out.
Those stars twinkling in the nighttime sky may actually be crystal spheres. And our beloved star is headed in that direction, too. Eventually.
If you think about it, it'll likely be an alien machine that encounters our probes searching for intelligent life. How's that going to work?
By Greg Fish
And while we're at it, why don't the other planets in our solar system seem to twinkle?
By Mark Mancini
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You could be reading this article deep in a dark matter rainforest filled with creatures in a roaring dark matter ecosystem — but have no clue.
Solving a math problem could get us one step closer to meeting E.T., so why haven't we figured out the Drake Equation by now?