The study also showed that the SVF cells produced by IntelliCell contain all of the viable cells that are manufactured by competing technologies that use enzymes, such as Cytori.

FORBES: Human Body's Fat Seen As best Source of Stem Cells For Regenerative Therapies

But over the past two years, he notes, scientists have discovered that they can generate viable animals from iPS cells.

FORBES: The Line Between Embryonic And Pluripotent Stem Cell Research Is Blurring

The NIH said the scientists who developed these stem cells lines have told the agency that the stem cells are viable and can be frozen and cultured and have been through more than one population doubling.

CNN: NIH announces owners of stem cells

Only in places unconnected to an electricity grid, such as much of rural Africa and rural Asia, are solar cells truly commercially viable.

ECONOMIST: Improved devices may make better use of sunlight

The problem is that making them using somatic-cell nuclear transfer involves breaking up viable embryos, since the cells in question are found inside early-stage embryos, called blastocysts.

ECONOMIST: Human embryonic stem cells

Is this true, or are adult stem cells and cord cells in fact viable alternatives that avoid the moral controversies that are at the core of the embryonic stem cell debate?

CNN: Future Summit stem cell forum

They made a bet on a particular technology that ended up not being viable as the price of solar photovoltaic cells has come down.

FORBES: Who Is Best Poised To Lead The Clean Energy Revolution?

By using easily obtainable cobalt and phosphates, the MIT work could make it a lot more viable to obtain hydrogen directly from solar cells.

ECONOMIST: Looking to leaves for a way to store solar power after sunset

Hydrogen fuel cells are at last becoming a viable alternative.

ECONOMIST: The future of energy

This means that, if and when they become commercially viable, they can be overlaid on traditional silicon cells to produce a device that converts a larger fraction of the incident sunlight into electricity.

ECONOMIST: Monitor