stem

You're paying for the stem, but you're not eating the stem.

And if so, do all stem from the same single origin?

The first theory is that the bubbles stem from a recent massive burst of star formation toward the center of our galaxy.

Why you paying for the stem?

Now, he was interested in this from the point of view of creating stem cells, a cell that can create any other kind of cell in the body, which we might be able to use for tissue repair in future.

They found that this was enough to turn back the biological clock in those cells, but without turning back the developmental clock and turning them into these stem cells.