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time

Physics

Why physicists keep trying to get rid of space-time entirely

Physicists are trying to ditch the concept of space-time – the supposed fabric of physical reality. Quantum columnist Karmela Padavic-Callaghan explains why

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John Harrison marine timekeeper at the Royal Observatory, Greenwich

Video

The clocks that helped define time from London's Royal Observatory

Video

Space

Most accurate space clock to launch – and count down to destruction

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Qubit, abstract illustration.

Physics

Space could emerge from time

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Elizabeth Ruth Belville receives a timekeeping certificate from an official at the Royal Greenwich Observatory, circa 1903. Once Belville has the accuracy of her watch, which she calls 'Arnold', confirmed in this way, her task is to 'take the time' round businesses in the West End and City of London. Belville's work was the means of ensuring standard time in the city before the advent of radio.

Video

Ruth Belville: How the Greenwich Time Lady kept London ticking

Video

The epic quest to redefine the second using the world's best clocks

Technology

The epic quest to redefine the second using the world's best clocks

Features

Physics

How nothing could destroy the universe

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Mind

Memory illusion makes you think events occurred earlier than they did

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The cosmic landscape of time that explains our universe's expansion

Space

The cosmic landscape of time that explains our universe's expansion

Features

Physics

Why exactly is the quantum world so weird?

We can describe the quantum realm using straightforward mathematics – but once we try to translate these ideas into the real world, things get weird. Our quantum columnist Karmela Padavic-Callaghan explains why

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Mind

Sci-fi thriller Dissolution smartly interweaves time travel and memory

Culture

Physics

Time can move both forwards and backwards at the quantum scale

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Physics

The 100-year-old symmetry theorem that is still changing physics today

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Humans

Ancient humans understood the future and the past pretty much as we do

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