Researchers say they discovered observational evidence of string theory, which could turn everything we know about the universe on its head.

The universe is a strange, beautiful place—rich with possibilities and governed by the odd rules of quantum mechanics. One of ...

But the simplest and most important question loomed large. Is string theory right? Does the math explain our universe? The description I’ve given suggests an experimental strategy. Examine ...

In order for that to work, string theory has to make one more radical assumption. That instead of living in a universe with three dimensions of space and one of time, we live in one with either 9 ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

Shocking’ results from a major astronomical study have raised doubts about the standard model of cosmology, forcing ...

Physicist Richard Lieu first explored the idea that gravity could exist without mass—now he’s got a new cosmological model that eschews the need for dark energy.

Theoretical physicist Michio Kaku explains why he thinks string theory is the best way to understand how the universe works. A new monkey bridge in Malaysia provides hope for wildlife navigating ...