Leigh Paterson

The ability to store energy could revolutionize the way electricity is made and used. But for many utility companies and regular folks, energy storage is still too costly and difficult.

Wyoming has long been one of the whitest states in the country, but over the last few years its black population has more than doubled. African-Americans still make up a tiny percentage of the state's population, but the substantial shift is largely a result of the oil boom of the last few years. But with oil prices so low, layoffs are looming.