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From the earliest stages of the hot Big Bang (and even before) to our dark energy-dominated present, how and when did the Universe grow up?

Should you blast the A/C even when you're not at home?

Over time, the Universe becomes less dominated by dark matter and more dominated by dark energy. Is one transforming into the other?

If you're a massless particle, you must always move at light speed. If you have mass, you must go slower. So why aren't any neutrinos slow?

The idea of gravitational redshift crossed Einstein's mind years before General Relativity was complete. Here's why it had to be there.

Now they're pointing the way to future battery technologies.

Ever since the Big Bang, cataclysmic events have released enormous amounts of energy. Here's the greatest one ever witnessed.

The site will be the first working example of a geological disposal facility.

For decades, theorists have been cooking up "theories of everything" to explain our Universe. Are all of them completely off-track?

Could Russia's plan actually destroy demand for natural gas?

Smashing things together at unprecedented energies sounds dangerous. But it's nothing the Universe hasn't already seen, and survived.

Scientists are solving the problem of costly energy storage.

Wind farms seem less productive when scientists incorporate more realistic atmospheric models into their output predictions.

With the right material at the right temperature and a magnetic track, physics really does allow perpetual motion without energy loss.

Before we discovered gravitational waves, multi-messenger astronomy got its start with light and particles arriving from the same event.

Wind energy is one of the cleanest, greenest sources of power. But could it have the sneaky side-effect of changing the weather?

In just a few seconds, a gamma-ray burst blasts out the same amount of energy that the Sun will radiate throughout its entire life.

Most electric car charging is done at night. A grid powered mostly by renewable energy might not be able to meet demand, but there is a solution.

Lasers are all around you. This ubiquitous technology came from our understanding of quantum physics.

13.8 billion years ago, the hot Big Bang gave rise to the Universe we know. Here's why the reverse, a Big Crunch, isn't how it will end.

Yes, dark energy is real. Yes, distant galaxies recede faster and faster as time goes on. But the expansion rate isn't accelerating at all.

The war in Ukraine is unlikely to trigger a catastrophic nuclear meltdown. Physics and smart engineering are the reasons why.

We can reasonably say that we understand the history of the Universe within one-trillionth of a second after the Big Bang. That's not good enough.

The new material may make marine uranium extraction economically feasible.

When the Universe was first born, the ingredients necessary for life were nowhere to be found. Only our "lucky stars" enabled our existence.

Pro-athletes are entertainers. Being healthy means something else.

IceCube just found an active galaxy in the nearby Universe, 47 million light-years away, through its neutrino emissions: a cosmic first.

More than any other of Einstein's equations, E = mc² is the most recognizable to people. But what does it all mean?

It's called DragonFire.

The biggest nuclear blast in history came courtesy of Tsar Bomba. We could make something at least 100 times more powerful.