Good things come in small packages? Not much smaller than these!

Betterhumans > Mouse Testicles Yield Potent Stem Cells:
"They have molecular markers in common with embryonic stem cells and can transform into blood-forming cells, vascular cells and beating heart muscle cells."

From Japan, the country that gave the world radios so small you could put one in a shirt pocket (I'm showing my age now), comes word that the testicles of newborn mice contain cells that would normally develop into sperm but can be coached to become multi-potent stem cells. Just how big is the testicle of a newborn mouse? More to the point, what ever possessed these guys to look there? A promising development from an unlikely source.