Two highly relevant metrics for analysing energy operations—which invariably involve the interest of various companies and institutions—are $/kWh and kWh/activity. $/kWh refers to the cost of all ...

AAAS: "Scientists have only discovered a tiny fraction of living insect species." From half-meter-long moths to fairy wasps smaller than sand grains, insects come in a stunning variety of shapes and ...

By Kennedy Maize Fuel cells, a proven way to make electricity without combustion, fission, or gravity, are making serious inroads into the red-hot market for producing power for artificial ...