Those Amazing Plastic Cells: More advances on the stem cell front:

One group of mice were injected with stem cells. After three weeks they were shown to be producing higher levels of mouse insulin than untreated mice and had lower blood sugar levels.

The injections also appeared to halt damaging changes taking place in the glomeruli, the bulb-like structures in the kidneys that filter the blood.

Researcher Dr Darwin Prockop said: "We are not certain whether the kidneys improved because the blood sugar was lower or because the human cells were helping to repair the kidneys.

"But we suspect the human cells were repairing the kidneys in much the same way they were repairing the insulin-producing cells in the pancreas."

Where did those stem cells come from? From adult bone marrow. Do you suppose Nancy's heard the news?