Estimates of how fast the universe is expanding disagree. Could a new form of dark energy resolve the problem?

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 ...

Science is filled with tools that once seemed revolutionary and are now just part of the research tool kit. That time may ...

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

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

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

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

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

Harris would continue the Biden administration’s landmark climate efforts; Trump would roll the country back to more oil and ...

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

To undo this bias, researchers are changing the algorithms and instruments and finding new models to reduce disparities.