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Physics

Cold fusion: Science's most controversial technology is back

The claim to have tamed the sun in the lab was debunked 25 years ago. So why are governments and investors now pouring money into it again?

Features

A map showing an earthquake thought to be the result of a nuclear test in North Korea

Earth

North Korea’s largest nuclear test still lacks missile capacity

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Physics

Five particles that don't exist – yet could change our world

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Physics

Lessons in reality from particles that don't exist

Features

Stars burning strangely make life in the multiverse more likely

Life

Stars burning strangely make life in the multiverse more likely

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Qubit

Technology

Revealed: Google's plan for quantum computer supremacy

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Metaphysics 6

Humans

Metaphysics special: Do we have free will?

Features

Metaphysics 3

Physics

Metaphysics special: Why is there something rather than nothing?

Features

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Humans

Metaphysics special: What is reality made of?

Features

Metaphysics 4

Humans

Metaphysics special: What is the meaning of life?

Your life may feel important to you, but does it have meaning? It's the biggest of all questions – and it has more than one answer

Features

Humans

Metaphysics special: Is time an illusion?

Features

Technology

Supersized molecules stretch a thousand times further than usual

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Space

Why quantum satellites will make it harder for states to snoop

Insight

Physics

Quantum trick sees two things happen before and after each other

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