Out of the limelight, theoretical physicists continue to seek a mathematical model that can explain the universe's particles ...

An curved arrow pointing right. Caltech theoretical physicist Sean Carroll stopped by Business Insider to talk about string theory, parallel universes, and other exciting topics he discusses in ...

An curved arrow pointing right. CalTech theoretical physicist Sean Carroll stopped by BI to talk about string theory, parallel universes, and other exciting topics he discusses in his new book ...

That would be compelling evidence for both string theory and parallel universes, and it would help explain why gravity seems to be so much weaker than the other fundamental forces. Still ...

A new model based on the famous alien-hunting Drake equation suggests that some parallel universes within the hypothetical ...

according to string theory, exist in parallel dimensional membranes—bump into one another, the impact sets off an astronomical Big Bang that generates a universe-worth of elements in the fiery ...

The fundamental particles of the universe that physicists have identified ... they appear to have no further internal substructure. String theory proclaims otherwise. According to string theory ...

Science fiction fans, philosophers, and physicists have been captivated by the idea of parallel universes, often known as multiverses, for many years. According to this intriguing theory ...

Theoretical physicist Michio Kaku explains why he thinks string theory is the best way to understand how the universe works.