Courtesy SeaDream

A Century After They First Appeared, Electric Boats Are Making a Comeback

In the late 1800s, electric boats were a promising new technology. They are now enjoying a revival.
Husk Power Systems

Running On Rice Husks—How One Entrepreneur Brought Electricity to His Village

In the rural Indian province of Bihar, Husk Power Systems is converting leftover rice husks into biofuel. Now they're building mini-power plants around the country, and expanding into Tanzania.
Thomas Edison with lightbulb

Thomas Edison and the War of the Currents

Thomas Edison had a big stake in the AC/DC war of the currents and would say anything to win.