President George W. Bush can truly tell his naysayers today, "I told you so!"

Differentiation of pluripotent stem cells occurs in a haphazard manner producing many types of differentiated cell. Such differentiated cells can be isolated from other cells, including stem cells, by fluorescence-activated cell sorting (FACS), by culture in conditions that favour one cell type over another, or by the use of selectable markers such as green fluorescent protein or resistance to neomycin. These selectable markers must be expressed from a promoter construct that is introduced (by electroporation or transfection) into the starting population of pluripotent stem cells and that drives expression of the marker in the differentiated cell type of interest. Cells can be transplanted as pure populations or, following tissue engineering, as tissues or physiologically functional parts of organs (organoids).
From Nature 414, 92-97

Ever since his unpopular veto of Federal funding for embryonic stem cell research President Bush has stuck to his guns that scientists would come up with an alternative method of developing embryonic stem cells, one that did not involve killing embryos.

Well, they did! It surely appears that his critics (never Mediawingnuts on this issue) will be eating crow as the results continue to pour in. Research into ploropotent stem cells (derived from adult stem cells) is producing results faster than the press can report them and faster than medical journals and dissertations in human biology can keep up.

More on all of this to come (SOON!), I'm quite certain.

You won't hear me say this too often, but ...

way to go Pres!!