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time

Tired woman holding alarm clock on head

Earth

Changing clocks twice a year is bad for health and energy use

Are you feeling tired today? Much of the UK got up an hour earlier this morning, a change that has been linked to heart attacks and strokes in some countries

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atomic clock

Technology

Atomic clocks make best measurement yet of relativity of time

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clock

Physics

Cosmic uncertainty: Does time go both ways?

Features

Galileo satellite

Space

Time to make sure Europe's troubled satnav system really flies

Comment

face artwork

Physics

Essence of reality: Hunting the universe's most basic ingredient

Features

Analogue alarm clock

Physics

One time or another: Our best 5 theories of the fourth dimension

Features

A crystal

Physics

World’s first time crystals cooked up using new recipe

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Visualisation of electron leaving atom

Physics

Smallest sliver of time yet measured sees electrons fleeing atom

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watch

Humans

Fast asleep? Your unconscious is still listening

Features

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

Culture

Humans

Metaphysics special: Is time an illusion?

Features

Physics

Water waves travel back in time to retrace their ripples

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Space

Time for more 2016: leap second will be added to year's end

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Physics

You can touch the heart of physics without doing the hard bits

Features

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