Applied Materials (nasdaq: AMAT - news - people ), are working to improve another thin-film technology that is extremely cheap but so inefficient it can't yet match First Solar in cost per kwh.

FORBES: Storm Clouds

The first railways couldn't rival canals on cost or reliability, let alone lobbying power.

WSJ: After Japan's Earthquake and Fukushima Disaster, Matt Ridley on Gas-Fired Generation and Thorium | Mind & Matter

The official answer to the first question is it won't really cost anything - or at least, nothing that will formally count as new spending or new debt.

BBC: Mr Osborne's small plan for big infrastructure

The first big expansion was one that didn't cost Mesa any cash.

FORBES: Second act

Other performers due to appear at the massive show include the Spice Girls, U2, and Madonna, while Jennifer Lopez will perform her new song Love Don't Cost A Thing for the first time.

BBC: Robbie Williams

Microsoft and its OEM partners haven't been particularly forthcoming on how much the first round of Windows 8 tablets are going to cost, but one Lenovo executive just gave us a hint.

ENGADGET: Windows 8 RT tablets to sell for $300 less than Intel-based counterparts, says Lenovo exec