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How much can something change and still be the same thing?

It’s simpler, more compact, and reusable from year-to-year in a way that no other calendar is. Here’s both how it works and how to use it.

If tourism is the lifeblood of the Peruvian economy, then Machu Picchu is the heart pumping that blood — in sickness and in health.

In many ways, it was worse than Chernobyl.

Metal-like materials have been discovered in a very strange place.

Air conditioning may keep a room cool, but using it is heating up the planet. It is time for something new — or old.

An interview with filmmaker Jason Sussberg about his new film about Stewart Brand and the importance of culture in achieving progress.

As the first Friedmann equation celebrates its 99th anniversary, it remains the one equation to describe our entire universe.

The quantum world — and its inherent uncertainty — defies our ability to describe it in words.

The pandemic and the Great Resignation fed into a perfect storm of inflation — and some restaurateurs cleaned up.

Cosmic inflation is the state that preceded and set up the hot Big Bang. Here’s what the Universe was like during that time period.

It was originally recorded in the 1970s by cognitive psychologists Harry McGurk and John MacDonald.

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

The Universe is expanding, and the Hubble constant tells us how fast. But how can it be a constant if the expansion is accelerating?

Looking with lasers, researchers discovered that many Olmec and Mayan ruins seem to have been constructed from the same blueprint.

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

After decades of development, whether NASA’s Webb succeeds or fails all comes down to five critical milestones that are only days away.

What do you call it when the Earth shakes for three decades?

If you think of the Big Bang as an explosion, we can trace it back to a single point-of-origin. But what if it happened everywhere at once?

The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?

Nothing can escape from a black hole. So where do Hawking radiation, relativistic jets, and X-ray emissions around black holes come from?

Move over, IC 1101. You may be impressively large, but you never stood a chance against the largest known galaxy: Alcyoneus.

Music therapy might boost memory, but the benefits are small. Just in case, tell your grandparents to listen to their favorite 1960s tunes.

Psychologists often view relationship power imbalances through three unique dynamics.

Many impact craters on Earth have been erased thanks to wind, water, and plate tectonics. But scientists have clever ways to find them.

When your passion becomes your day job, sometimes the day job becomes a chore.

Often viewed as a purely theoretical, calculational tool only, direct observation of the Lamb Shift proved their very real existence.

9 minutes of cruel history may cure the anti-progress delusion.

The common drug is called gabapentin, which is currently used to control seizures and manage nerve pain.

Overwintering is profoundly stressful for trees. So why do they bother?