While it remains to be seen if Calera can produce cement strong enough to be useful in construction, the company is toying with a radical business model: It will give away cement while charging polluters a fee for removing their emissions.

FORBES: Thought Leaders

The idea of using a magnetic field as a solar sail was first suggested a few years ago, but it soon became apparent that creating a field strong enough to be useful would require exotic superconducting materials that, unfortunately, do not exist.

ECONOMIST: Rockets are not the only way to travel through outer space

Small Business service and page offer a wide range of products, including: Domain registration, website hosting, loan calculators, a marketing dashboard and toolset (that I reviewed some months back for YSMB, just to be transparent), and many other useful tools that could become mobile tools, in addition to strong content.

FORBES: Yahoo! Revives Flickr And Sees Growth In Mobile Apps And Content