Scientists studying a mysterious effect called cosmic birefringence—a subtle twist in the polarization of the universe’s oldest light—have developed a new way to reduce uncertainty in how it’s ...

A new three-volume study explores how quantum physics, gravitation and cosmology may be understood within a unified ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a misunderstanding of work by physicists Albert Einstein and Nathan Rosen. In 1935, ...

Since humanity's earliest days, people have looked up at the stars, using science, art, religion, philosophy, mathematics, and any other tool at their disposal to better understand the complicated and ...

HOUSTON—NASA’s SPHEREx observatory completed the first of four planned all-sky surveys in 102 infrared wavelengths as 2025 neared its end to help answer some key astrophysical questions about the ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.

The discovery of the universe’s oldest stars, identified within our own Milky Way galaxy, marks a significant leap forward in ...