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time

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Physics

Time travel sci-fi novel is a rip-roaringly good thought experiment

An ordinary-looking valley has a secret – each of its neighbours is 20 years removed in time. Scott Alexander Howard's debut is heartfelt and deeply enjoyable, says Emily H. Wilson

Culture

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Physics

You can turn any random sequence of events into a clock

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Mathematics

Is the universe a game?

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Space

Time ticks faster on the moon by 57 microseconds per Earth day

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Physics

How physics is helping us to explain why time always moves forwards

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Are space and time illusions? The answer could lie in black holes

Physics

Are space and time illusions? The answer could lie in black holes

Features

What

Physics

What "naked" singularities are revealing about quantum space-time

Features

Physics

How to wrap your mind around the real multiverse

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How materials that rewind light can test physics' most extreme ideas

Physics

How materials that rewind light can test physics' most extreme ideas

Features

Physics

Time may be an illusion created by quantum entanglement

The true nature of time has eluded physicists for centuries, but a new theoretical model suggests it may only exist due to entanglement between quantum objects

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Physics

Quantum time travel: The experiment to 'send a particle into the past'

Features

Physics

Quantum 'arrow of time' suggests early universe had no entanglement

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Physics

How indefinite causality could lead us to a theory of quantum gravity

Features

Mathematics

500-year-old maths problem turns out to apply to coffee and clocks

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