What Even Is Time? An Explainer

Time depends on speed and mass, which means it’s not as consistent as we think.

The idea of ‘absolute time’ is an illusion. Physics and subjective experience reveal why.

A close look at fundamental symmetries has exposed hidden patterns in the universe. Physicists think that those same symmetries may also reveal time’s original secret.

Most of us tend to think of time as linear, absolute and constantly “running out”—but is that really true? And how can we change our perceptions to feel better about its passing?

March was 30 years long and April was 30 minutes long. What gives? We talked to a time philosopher to find out.

Mind time cannot be measured on a watch.

From HG Wells to the Doctor and beyond … how technology caught up with science fiction.

The passage of time seems to speed up as we get older—but research finds this unnerving phenomenon may be allayed by learning to more attentively savor all the familiar details of our lives.

The passage of time seems to speed up as we get older—but research finds this unnerving phenomenon may be allayed by learning to more attentively savor all the familiar details of our lives.

Analog clocks are not outdated; they are powerful productivity tools for adults with ADHD who struggle with time blindness, deadlines, time estimation. Here’s how analog clocks help ADHD brains.

Some days seem to pass very slowly while some weeks, and even months, fly by. A set of simple perception tests illustrate some factors that can distort our sense of time.