The Substance That Might Have Existed Before The Big Bang
Most people assume that the Big Bang was the beginning of all things, but current scientific models point to another cosmic origin.
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Here's Why We Still Don't Know How Many Solar Systems Are In The Milky Way
We've known for over 30 years that there are other stellar systems in our galaxy, but we don't have any idea how many there are.
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Two Bizarre Bubbles Sandwich The Milky Way Galaxy. Here's What They Could Be
Space is a big place and there's lots of strange stuff out there, but scientists aren't quite sure where these massive space bubbles came from.
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Why Humans Haven't Gone Back To The Moon Since 1972
No one has been back to the moon for over 50 years, but the reasons why are multifaceted and not obvious at first glance.
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How Space Permanently Damages Astronauts
While space travel seems like a thrilling endeavor, it does come with its drawbacks, sometimes in the form of permanent damage to astronauts' minds and bodies.
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What Would Really Happen If The Moon Disappeared?
As Earth's ever-present celestial companion, the moon exerts a constant influence on our planet, and its disappearance would be a massive shock to all life.
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What Would Happen If The Sun Suddenly Exploded?
We don't have to worry about the death of the sun any time soon, but when it does happen, will the Earth be able to survive?
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How To Calculate The Speed Of Light
Light is very, very fast, and calculating its speed wasn't easy. In fact, there's a rather long history of how this constant value was determined.
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The Sun Could Enter An Even More Dangerous Phase Than Solar Maximum
The Sun's activity typically peaks at solar maximum, but there's an even more dangerous stage it could enter, and with potentially dire consequences.
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5 Worlds Where Extraterrestrial Life Could Be Hiding
Life is tenacious and the universe is vast, so some are confident that extraterrestrial life is hiding out there. These worlds are the top contenders.
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Stephen Hawking's Grim Prediction For The End Of The World
Stephen Hawking was one of the greatest minds of our time, that's why his predictions for the potential end of the world can be so unsettling.
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Terrestrial Life May Not Have Started On Earth
Nobody knows how life began on Earth, but some tantalizing clues from an asteroid suggest it might not have started here.
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The Rare Celestial Event That Will Eventually Disappear For Earth
Total eclipses are one of the most majestic natural phenomena you can witness, but thanks to a quirk of celestial mechanics, they won't be around forever.
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4 Bright Objects In Space That Aren't Actually Stars
On a dark and clear night, the sky can seem filled with stars, some shining brighter than others. But a few of those bright objects aren't actually stars.
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5 Ancient Artifacts That Are Made From Meteorites
Strange metallic rocks have been falling from the sky for millennia, and sometimes those rocks are turned into surprising items.
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Details Most People Don't Know About Life On The ISS
Life in space is very different from life on Earth; that much is pretty obvious. But what does the regular routine of an astronaut actually look like?
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Top 5 Coolest Things The Curiosity Rover Has Found On Mars
The Curiosity rover has been carrying out its mission on Mars for many years, and it's made some pretty cool discoveries. Here are a few of them.
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The 5 Youngest Planets Ever Discovered
Exoplanets present quite a few mysteries (and potential answers to long-standing questions) for astronomers. And that's especially true of young exoplanets.
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When Did Earth Get Its Moon
The moon is Earth's longtime, familiar companion, the story of when and how it got there is actually a bit of an unanswered question in astronomy.
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Why The Moon's Atmosphere Is So Different From Earth's
The fact that you can't breathe on the moon probably isn't surprising. That said, the moon does have an atmosphere; it's just very different than Earth's.
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The Story Of The Astronaut Who Returned From Space To Find His Country Didn't Exist
The fall of the Soviet Union was a hugely consequential event in history, but it also had some strange side effects that might not be as well known.
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What Is The Difference Between The Lunar Calendar & The Solar Calendar?
Methods of tracking time have been around for millenia, but not all calendars used by ancient civilizations were the same. Here are the major differences.
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Earth's Moon Will Experience A Rare Color Change In March 2025
Early 2025 has already played host to some spectacular astronomical events, and there are more to come. In March, look to the moon to watch it change color.
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Uranus And Neptune's Deepest Oceans Make Earth's Look Like Puddles
Earth's oceans are mysterious, largely unexplored places, but the enormous oceans of Neptune and Uranus have them beat. Here's what scientists know about them.
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NASA Is Tracking A Rare Planet Unlike Anything In Our Solar System
While our solar system is a fascinating place on its own, exoplanets are even more of a mystery. And one exoplanet in particular is something quite new.
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A Rare Lunar Event Could Reveal Stonehenge's Secrets
It's long seemed like Stonehenge harbors many secrets, and it's not keen on giving them up. But a rare lunar event might finally give us some answers.
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The Characteristics Of The Eight Planets
The planets in the solar system have long held a place in human history and culture, but there's also plenty to know about the planets themselves.
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