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See how gravitational waves warp time and space

The latest gravitational-wave discoveries include record-breaking cataclysms

What are the smallest pieces of the universe?

Physicists are searching for what lies underneath the particles we know

The questions science may never answer

Will some of the biggest mysteries in science remain forever unsolved?

October 2026: Science history from 50, 100 and 150 years ago

Smallpox eradication; skyscraper excavations; research on the racetrack

Google DeepMind wants Gemini to power many different robots

The company's push into physical AI is putting Gemini inside humanoids—and testing whether its intelligence can survive in the real world

How apple detectives solved the mystery of an ancient tree—and rewrote the history of fruit

And how they might have helped save the future of American apples

Science crossword: Broken thoughts

Play this crossword inspired by the October 2026 issue of Scientific American

Will we ever know how life began?

Scientists disagree on how biology got started and on whether we can ever know for sure

What if we never find dark matter?

Could the hunt for the universe's missing matter be the biggest wild goose chase in scientific history?

Math Puzzle: A puzzling picture

Hang a painting poorly in this math puzzle

Most People Don’t Think About Culverts. Their Failure Can Be Deadly.

ALEXANDER NAZARYAN

Scientists simulated what happens when the pipes and tunnels that divert rainwater fail. In one scenario, 30 percent of local residents couldn’t reach an E.R.

Do universal free lunch programs affect students' academic performance?

Experts say free lunch for every child improves academic performance. Whether it does is murky, according to a Scientific American analysis, but there are definite financial and social benefits.

The U.S. has weapons in space

A high-ranking official announced yesterday that the U.S. military has deployed weapons into orbit to counter threats from Russia and China

Which million-dollar math problem could AI solve next?

After an OpenAI model presented a possible solution to the Navier-Stokes problem, mathematicians are speculating about which major unsolved question could be resolved next

How pizza can solve this unusual math puzzle

Moser's circle problem can be used to divide a pizza into one, two, four, eight, 16 or 31 slices. It's a perfect example of how the numbers in a sequence aren't as clear-cut as they may first appear