Such big projects make sense for large solar-cell producers like SunPower and Arizona-based First Solar, since they provide reliable demand with which to keep their manufacturing plants running at peak efficiency.

ECONOMIST: Some solar plants need to be big; most of them don��t

Among outside experts there's a consensus that if hydrogen-fuel-cell cars ever make economic sense, it will be a long time from now.

FORBES: Magazine Article

Cell phone technology is changing quickly, and a rule for cell phones today might not make much sense tomorrow.

FORBES: Court Ruling Opens Phones To Warrantless Searches

In 2002 MIT professors started a not-for-profit called BioBricks that has collected 2, 000 biological components, including gene sequences that sense light, produce light, send messages between cells and switch cell functions on and off.

FORBES: Architect of Life

The mirrors of my house filled me with such a sense of gladness that a room without one struck me as a dark cell.

NEWYORKER: Miracle Polish

To achieve that, the engineers will have to include multiple cell types and devise a system that allows the lab-built creature to sense its environment and use an internal "decision-making circuit" to pick different behaviors.

WSJ: Jellyfish Hints at Fix for Damaged Hearts