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What is time? The mysterious essence of the fourth dimension

Physics

What is time? The mysterious essence of the fourth dimension

The true nature of time continues to elude us. But whether it is a fundamental part of the cosmos or an illusion made in our minds has profound implications for our understanding of the universe

Features

3 How Do We Sense Time? Mechanical brain, conceptual image. Composite image of coloured medical imagery of a human brain and skull, with cogs and gears representing concepts such as memory, time and mechanical brains. The imagery includes 3D computed tomography (CT) scans of the skull and 3D magnetic resonance imaging (MRI) scans of the brain. The scans are of a 30-year-old woman.

Mind

How do we sense time? The brain cells that order our memories

Features

Gaia

Space

Gaia telescope’s new map of the Milky Way will let us rewind time

News

A stock image of crystals

Physics

A new kind of time crystal has been created and lasts 10 milliseconds

News

rat contemplating time

Life

Rats can track the passage of time and judge their accuracy

News

What the thermodynamics of clocks tell us about the mysteries of time

Physics

What the thermodynamics of clocks tell us about the mysteries of time

Features

WHY does time only move forward?

Physics

Why does time only move forwards? Possibly just because we’re ignorant

Features

Stopwatch at swimming race

Technology

Stopwatch errors could make race times wrong by a tenth of a second

News

When time runs backwards: What thermodynamics can tell us about life

Physics

When time runs backwards: What thermodynamics can tell us about life

Features

Measuring time accurately increases the entropy in the universe

Physics

Measuring time accurately increases the entropy in the universe

A clock with controllable accuracy has shown that the better a clock is at timekeeping, the more entropy it will produce in the form of heat, increasing disorder as it ticks

News

Physics

Did time flow in two directions from the big bang, making two futures?

Features

How time works with Sean Carroll

Technology

Tenet review: Time twisting fun that is head-spinningly hard to grasp

Culture

Physics

Inside the incredibly slow race to reinvent time

Features