If you could take an apple and break it into smaller and smaller parts, you would find molecules, then atoms, followed by subatomic particles like protons and the quarks and gluons that make them up.

In 1980, Stephen Hawking gave his first lecture as Lucasian Professor at the University of Cambridge. The lecture was called "Is the end in sight for theoretical physics?" Forty-five years later, ...

Physicists may have uncovered a surprising new clue that string theory—the idea that the universe is built from unimaginably tiny vibrating strings—could be more than just a mathematical fantasy.

Is string theory science? Physicists and cosmologists have been debating the question for the past decade. Now the community is looking to philosophy for help. Earlier this month, some of the feuding ...

String theory is the idea that the fundamental particles we observe are not point-like dots, but rather tiny strings. String theory is one of the most famous ideas in modern physics, but it is also ...

Promise and controversy continues to surround string theory as a potential unified theory of everything. In the latest episode of The Joy of Why, Cumrun Vafa discusses his progress in trying to find ...