New type of rechargeable battery – just add water

New type of rechargeable battery – just add water: "Scientists at Stanford have developed a battery that uses nanotechnology to create electricity from the difference in salt content between fresh water and sea water. The researchers hope to use the technology to create power plants where fresh-water rivers flow into the ocean"

US$200,000+ Convertible SLS AMG Roadster breaks cover

US$200,000+ Convertible SLS AMG Roadster breaks cover: "Though the SLS AMG Roadster is now in showrooms, and we've just seen the first images of the 563 bhp convertible version a few minutes ago, they were developed in parallel and they're apparently so close in so many ways that choice will boil down to personal preference, not driving dynamics."