Fifteen years ago cosmologists were flying high. The simple but wildly successful “standard model of cosmology” could, with just a few ingredients, account for a lot of what we see in the ...

Flex your math muscles with this weekend’s brain teaser. Play now.

Their dream came spectacularly true on that momentous day in 1974. The Lucy fossil preserved skull fragments and a lower jaw ...

Long ago we humans defined a day as the time it takes Earth to make one rotation about its axis, with one sunrise and one sunset. Our predecessors partitioned that day into 24 hours. But if Earth ...

No words are needed for animals to perform all sorts of problem-solving challenges outplay humans in a strategy game New ...

Phone apps can tell whether your kid is playing hooky. But remotely surveilling your child might not be great for navigating ...

Gentle nasal spray vaccines against COVID, the flu and RSV are coming. They may work better than shots in the arm ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www.springernature.com/us). Scientific ...

Anyone who is capable of seeing the moon (or the sun) near the horizon has experienced this effect. The moon looks enormous ...

Pediatric long COVID is more common than many thought, and we keep letting kids be reinfected with new variants ...

For the first time, we are sending a spacecraft to explore an alien ocean world—a moon that might host life today ...