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It's common knowledge that syncing your circadian rhythm to a natural light-dark cycle could improve your health and well-being.

Atomic clocks keep time accurately to within 1 second every 33 billion years. Nuclear clocks could blow them all away.

Science can’t stop aging, but it may be able to slow our epigenetic clocks.

Extremely precise atomic clocks are not just of theoretical interest; they could help detect impending volcanic eruptions or melting glaciers.

Time isn't the same for everyone, even on Earth. Flying around the world gave Einstein the ultimate test. No one is immune from relativity.

Over the past 50 years, 27 leap seconds have been added to our time.

Quantum entanglement may remain spooky, but it has a very practical side.

Every timekeeping device works via a version of a pendulum — even the atomic clocks that are accurate to nanoseconds.

Daylight saving time was first implemented during the first world war to take advantage of longer daylight hours and save energy. While this made a difference when we heavily relied on coal […]

Even though the brain is only 2% of our total body mass, it consumes up to 25% of our energy.

The idea of "absolute time" was our default for millennia. But time is relative, as gravity and motion both cause time to dilate.

Escape a mental rut by using nostalgia.

More work is needed before declaring the technique a fountain of youth.

Modern cosmology conjectures different possible fates for the Universe and thus for the end of time. Details depend on which model is right.

Do our thoughts have any meaning whatsoever?

For college students, it's the early afternoon.

Your old-fashioned chronological age is just a number. Your biological age can tell you how healthy you really are.

Do the health risks outweigh the benefits?

Short-termism is both rooted in our most primal instincts and encouraged by runaway technological development. How can we fight it?

Gamification, minimalist design, using AI to track behavior — this article dives into these and other key ways to optimize an eLearning strategy.

Our temporal experience of the world is not divided into a series of neat segments, yet that's how we talk about time.

Ever since the start of the hot Big Bang, time ticks forward as the Universe expands. But could time ever run backward, instead?

Proponents of transhumanism make big promises, such as a future in which we upload our minds into a supercomputer. But there is a fatal flaw in this argument: reductionism.

We think of physical reality as what objectively exists, independent of any observer. But relativity and quantum physics say otherwise.

These were the stories you clicked on the most.

We live in a four-dimensional Universe, where matter and energy curve the fabric of spacetime. But time sure is different from space!

The combination of charge conjugation, parity, and time-reversal symmetry is known as CPT. And it must never be broken. Ever.

"Spanish Stonehenge" contains 526 giant stones, three circular burial sites, a quarry, and four necropolises.

Einstein's most famous equation is E = mc², which describes the rest mass energy inherent to particles. But motion matters for energy, too.