Science & Space

Which Knot Is Stronger? Humans Aren’t Great Judges

People are surprisingly bad at guessing knot strength, a study found

A Backyard Bird Offers a New Way of Thinking about Sexes

White-throated Sparrows demonstrate that traits we usually associate with sex ca...

Science History from 50, 100 and 150 Years Ago

Color blindness; the end of fire

Readers Respond to the November 2024 Issue

Letters to the editors for the November 2024 issue of Scientific American

Immigration Fuels Innovation in Science to Make the U.S...

The U.S. will need more than one million STEM workers in the next 10 years to st...

Poem: ‘(origins, positrons)’

Science in meter and verse

A Fascinating Sparrow, Aha! Moments and Local Flowers

Astronomers search for missing planets, a salty food movement takes hold, and it...

The Elusive Brain Science of ‘Aha! Moments’

What happens in your mind when insight strikes?

Broken Legs and Ankles Heal Better If You Walk on Them ...

Using crutches for months is largely a thing of the past. Early weight-bearing h...

Math Puzzle: Follow the Calculator Clues

Decode the clues from a broken calculator in this math puzzle

Save a massive 36% on the Star Wars Black Series Force ...

With a huge 36% off, you can grab an unbeatable Star Wars deal on this feature-p...

'Perhaps it's only a matter of time': Intelligent life ...

For decades, scientists assumed that life on Earth emerged through a chain of hi...

What is an Engineer? (Grades K-4)

This article is for students grades K-4. Engineers solve problems. They use scie...

Why We Think Theia Existed

The giant-impact hypothesis posits that billions of years ago a Mars-sized body ...

Did you know they make magnetic rowers that fit in your...

This one is quiet, sturdy, easy to store, and on sale for $199.99. The post Did ...

Cosmic voids may explain the universe's acceleration wi...

New research suggests that dark energy isn't needed to explain the acceleration ...

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