PHOTO GALLERIES
5 PHOTOS
ASTRONOMY
Could our galaxy be full of aliens? The famous Drake Equation guides us towards an answer
Discover how the Drake Equation can help us estimate the abundance or absence of intelligent life in our galaxy.
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ASTRONOMY
Mars could become humanity's second home by 2050, says space resources engineer
Could humanity build its second home before the middle of this century? Here's what engineers and scientists think.
What's really inside a black hole? Physicist Clifford Johnson explains
The mystery of what lies beyond a black hole remains unsolved. Here's what scientists think would happen.
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ASTRONOMY
Could alien technology be easier to detect than extraterrestrial life itself? Scientists share their thoughts
What if alien technology leaves clearer clues than alien biosignatures?
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DEEP SKY OBJECTS
What if time isn't real? Some physicists think it might just be in our heads
Physicists have spent centuries treating time as a basic fact of the universe. Now, some are challenging that idea. Here's how.
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ASTRONOMY
By 2600, Earth could become a "giant ball of fire," Stephen Hawking warned. Is NASA backing it up?
Hawking warned that this population growth can't continue, or it will end badly for Earth. But here's what NASA says.
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ASTRONOMY
Earth's life may have begun after a colossal collision with a Mars-sized planet, studies hint
What if Earth's greatest catastrophe also created the conditions needed for the first living organisms?
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ASTRONOMY
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ASTRONOMY
Contacting aliens could be our "biggest mistake in human history," warns physicist; here's why
Earth has been signaling its presence into space for decades. Scientists say that's way too risky.
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SPACEFLIGHT
This accidental discovery could dramatically reduce astronauts' travel time to Mars
“This was a surprise for me—I was not looking for this."
Astronomer reveals one of the biggest misconceptions about alien life
Could our biggest assumptions about extraterrestrials be wrong? A scientist explains why we're searching the wrong way.
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ASTRONOMY
Are we going through a sixth mass extinction? Here's what scientists say is happening
Our planet has already survived five mass extinctions. Researchers say we're now living through the sixth. Here's what that means for life on Earth.
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ASTRONOMY
5 facts about our solar system that seem too strange to be true
Think you know the solar system? These 5 facts might surprise you.
6 PHOTOS
ASTRONOMY
4 surprising discoveries NASA's Perseverance rover has made on Mars
Explore the discoveries made by NASA's Perseverance rover that reveal new clues about Mars and its mysterious past.
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ASTRONOMY
Is a fourth dimension hiding right in front of us? Scientists think so
We live every day as if the world is exactly as it appears. But what if, just beyond what we can see, there's a world completely hidden from us?
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ASTRONOMY
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ASTRONOMY
5 amazing facts about Saturn's largest moon Titan that you probably didn't know
From having a thick atmosphere to being one of the strongest candidates in the solar system with the potential to support life, Titan is quite fascinating.
5 PHOTOS
SPACEFLIGHT
NASA’s Artemis program might finally solve these long-standing Moon mysteries
Scientists hope to use the Moon as a Rosetta Stone for the origin and evolution of Earth and the solar system at large. NASA's Artemis program could enable this.
SETI chief: "I do believe aliens are real"—but they don't look like anything we imagine
We've long pictured aliens as little green men. SETI's chief says that's probably wrong.
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ASTRONOMY
The milestones that turned SpaceX into a private space giant
Here's how SpaceX went from repeated launch failures to a global private space powerhouse.
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SPACEFLIGHT
Could alien technology have already reached Earth? Harvard scientist Avi Loeb is searching for evidence
The Galileo Project by Harvard astronomer Avi Loeb is investigating whether aliens are carrying out reconnaissance activities on Earth.
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ASTRONOMY
Colonizing Mars “is the dumbest thing I've ever heard”, says Nobel Prize Winner Gary Ruvkun
Could moving to Mars save humanity, or are we solving the wrong problem? Here's what one Nobel winner says.
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ASTRONOMY