A study released by the National Security Space Office says that space-based solar-power systems could be built within several decades.
Combining energy technologies could help lighten the load.
They won't cause blackouts, and they don't actually have to be plugged in.
An economist argues that raising taxes on gasoline could have an unexpected benefit: a less obese population.
A new report warns of the dangers of relying on biofuels to reduce carbon emissions and oil consumption.
The automaker demonstrates long-awaited homogeneous-charge-compression ignition.
A new agency will fund risky research that just might pay off.
Harvesting geothermal energy from deep underground has great potential, but it faces significant obstacles.
The House and Senate may usher in new gas-saving technologies.
We knew they would save gas; now we know they're cleaner, too.