A ‘Dark Oxygen’ Mystery Is Unfolding at the Ocean Bottom—But Undersea Mining Giants May Soon Move In
When researchers discovered evidence of “dark oxygen” last year, the news spread around the world, but the biggest challenge to the science comes from its funders
The U.S. Just Axed Its Boldest Cosmology Experiment in Generations
Superheated Gold Defies ‘Entropy Catastrophe’ Limit, Overturning 40-Year-Old Physics
We Just Discovered the Sounds of Spacetime. Let’s Keep Listening
What Is Thimerosal? Why Most Vaccines Don’t Contain Mercury Anymore
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Spellements: Thursday, July 24, 2025
Expert Sudoku: July 24, 2025
What It’s Like to Live and Work on the Greenland Ice Sheet
Hulk Hogan’s Biggest Impact May Have Been in Digital Privacy
Create as many words as you can!
Stretch your math muscles with these puzzles.
The Secret to the Strongest Force in the Universe
Why Aren’t We Made of Antimatter?
Bring These Scientific American–Recommended Books to the Beach This Summer
Were the Wright Brothers First in Flight? Inside a 1925 Dispute
The Surprising Science of Dungeons and Dragons
The LIGO Lab Is Pushing the Boundaries of Gravitational-Wave Research
When the Sun Becomes a Red Giant, Will Any Planet Be Safe?
The future is bright—too bright—for life as we know it once the sun transforms into a red giant star
Millions Swelter under Relentless Heat Dome Smothering Eastern U.S.
High humidity and low overnight temperatures will put tens of millions of people under heat alerts over the course of the coming week
‘Corn Sweat’ Is Making This Heat Wave Even Worse
Humid heat is blanketing the eastern U.S. this week, exacerbated by “corn sweat” in the Midwest
Superheated Gold Defies ‘Entropy Catastrophe’ Limit, Overturning 40-Year-Old Physics
Physicists superheated gold to 14 times its melting point, disproving a long-standing prediction about the temperature limits of solids
The U.S. Just Axed Its Boldest Cosmology Experiment in Generations
Researchers hoped CMB-S4, a $900-million cosmology experiment, would answer one of the greatest questions in physics. Instead it’s become another cautionary tale of pursuing big science amid shrinking budgets
How Logical Are You? Test Your Skills With These Problems from the New International Logic Olympiad
In only its second year, the International Logic Olympiad is already booming as logic becomes more and more crucial in our ever changing world