Dimensions beyond the four we’re familiar with could solve a host of problems in physics and cosmology. Columnist Leah Crane ...

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

A thin shell of air wraps around Earth, stretching about 20 miles above the surface. This invisible veil is packed with tiny molecules that sustain life. Just beyond this fragile layer lies the ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty? Subscribe to our newsletter for the latest sci ...

According to a new theory, our universe developed from a “pre-inflationary multiverse” made of particles in quantum superposition.

New 3D map of the early universe from HETDEX reveals faint hydrogen light linking galaxies 9 to 11 billion years ago.