Energy

Solar Impulse's coast-to-coast journey began in early May in California.

Solar Impulse is expected to land in New York City early Sunday, after roughly 21 hours in the air.

Can combining heat and power save our energy future?

Fossil fuels are more plentiful than we thought — but should we use them?

After a short detour in Ohio, the Solar Impulse plane will fly to Washington, D.C.

Harnessing sun’s energy presents challenges to existing power networks.

Can the ocean provide our electricity?

Study suggests less sleep may up obesity risk due to changes in eating habits

By staying awake all night, we burn more calories than scientists thought we would.

Scientists have come up with a new equation to accurately determine how much energy people use while walking, taking into account their height and weight.

The FDA announced today that alcoholic beverages with added caffeine are illegal and dangerous. Experts explain why these drinks pack such a punch.

But researchers still don't know if increased brain activity has a detrimental effect on our health.

The Solar Impulse aircraft flew from Phoenix to Dallas in 18 hours and 21 minutes.

Tide-borne pebbles on the seabed can drown out other ocean noises.

Hippie associations aside, marijuana cultivation is typically energy-intensive.

Solar panels are more affordable and more efficient, but hurdles remain.

With power from sunlight, the ultra-lightweight plane touches down after an 18-hour flight.

The Solar Impulse flight is a bold attempt to fly across the country without using a single drop of fuel.

A new solar cell can produce two electrons for every particle of light that hits it, at least at certain wavelengths.

And it's in the oil-rich Middle East.