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Apart from the energy needed to flip the switch, no other energy is needed to transmit the information.

Quantum mechanics has taught us that even empty space contains energy. "Negative energy" is the state of having less energy than empty space.

Capacitors, acid batteries, and other methods of storing electric charges all lose energy over time. These gravity-fed batteries won't.

Nuclear fusion has long been seen as the future of energy. As the NIF now passes the breakeven point, how close are we to our ultimate goal?

They are expected to be cheaper to build and even more reliable than today’s nuclear plants.

Amplifying the energy within a laser, over and over, won't get you an infinite amount of energy. There's a fundamental limit due to physics.

Every power source involves trade-offs. Given the challenges of increasing demand and climate change, what is the future of energy?

The zero-point energy of empty space is not zero. Even with all the physics we know, we have no idea how to calculate what it ought to be.

As time goes on, dark energy makes distant galaxies recede from us ever faster in our expanding Universe. But nothing truly disappears.

Don't put all your eggs in one basket.

If you gave me $400 and I gave you $3.15, would you consider yourself wealthier? That's a financial analogy for the supposed fusion power "breakthrough."

What if we could harvest energy from human heat, sweat, or vibrations?

It was a particularly good year for biotech and medical technology. There were also notable advances in energy.

Let's celebrate the progress, but put the cork back in the champagne bottle.

By digging deep, we could harness enough energy to power generations to come. But it involves fracking.

Capturing energy from clubbers could help power homes and buildings.

Best in class: Denmark and Uruguay. Worst in class: Papua New Guinea, Venezuela, and Russia.

Dark energy is one of the biggest mysteries in all the Universe. Is there some way to avoid "having to live with it?"

This company uses thousands of mirrors, AI, and machine learning to unlock the power of the sun.

Are quantum fields real, or are they simply calculational tools? These 3 experiments show that if energy is real, so are quantum fields.

Innovative thinking has done away with problems that long dogged the electric devices — and both scientists and environmentalists are excited about the possibilities.

Dr. Tyson explains where we might find aliens, why "dark matter" is a misleading term, and why you can blame physics for your favorite team's loss.

We are about to learn a lot more about the most elusive of cosmic particles.

Lithium-ion batteries pose challenges for our transition toward renewable energy. Sodium-sulfur batteries might be a solution.

A community in Austin, Texas is using geothermal energy to keep homes warm in the winter and cool in the summer.

It could one day fuel nuclear fusion reactors.

You might think it's impossible to run out of wind, but Europe's "wind drought" proves otherwise. And it's only going to get worse.

It has no moving parts and could allow us to tap into renewable energy year round.

If it weren't for the intricate rules of quantum physics, we wouldn't have formed neutral atoms "only" ~380,000 years after the Big Bang.

Its implications go well beyond the Earth itself, affecting even the future of space travel.