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Physics

See the latest physics news and expert analysis on dark matter, the multiverse, theoretical and particle physics, quantum theory, and more from the world of physics.

Time Machine

Physics

Fast forward: How we learned to love time travel

A classic H. G. Wells story and key mathematics made time travel such a popular idea that it fundamentally changed our thinking, argues James Gleick in Time Travel: A history

particle pic

Physics

Five particles that don’t exist 鈥� yet could change our world

particles artwork 1

Physics

Lessons in reality from particles that don’t exist

Life

Stars burning strangely make life in the multiverse more likely

planet heading for a yellow sun

Physics

Gang of gas giants may have tilted distant planet system

Metaphysics 1

Humans

Metaphysics special: How do I know I exist?

Metaphysics 2

Humans

Metaphysics special: What is consciousness?

Metaphysics 3

Mind

Metaphysics special: Why is there something rather than nothing?

Metaphysics 4

Humans

Metaphysics special: What is the meaning of life?

Metaphysics 5

Earth

Metaphysics special: Where do good and evil come from?

We all have a sense of morality, and most of us agree on what is good. But in truth, good聽and evil may have a lot in common

Humans

Metaphysics special: Do we have free will?

Humans

Metaphysics special: What is reality made of?

Humans

Metaphysics special: Is time an illusion?

Humans

Metaphysics special: Can we ever know if God exists?