A fascinating article about “rotor sails”, a new, more efficient way to power ocean-going ships.

Early next year, a tanker vessel owned by Maersk, the Danish transportation conglomerate, and a passenger ship owned by Viking Cruises will be outfitted with spinning cylinders on their decks. Mounted vertically and up to 10 stories tall, these “rotor sails” could slash fuel consumption up to 10%, saving transportation companies hundreds of thousands of dollars and cutting soot-causing carbon emissions by thousands of tons per trip.

Read Article:  http://www.sciencemag.org/news/2017/09/spinning-metal-sails-could-slash-fuel-consumption-emissions-cargo-ships