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Tumour cells that can initiate a new tumour are not so rare as previously thought, putting the concept of the 'cancer stem cell' under the spotlight again.
Worries that the NIH did not properly evaluate informed consent by donors of embryos from which stem cell lines were derived throw oversight committees into disarray
Seventy years ago, the desert sands of Arabia revealed vast oil reserves. That wealth is now being put to work to fund potential new sources of revenue