JM+Stem+Cell+Article

Stem Cell Article (1) When were stem cells first taken from a human embryo? (2) Why is obtaining stem cells from a human embryo so controversial? (3) What was/is the source of human embryos for stem cell research? (4) What is a stem cell? (5) What diseases do we think we could treat with stem cells? (6) Dr. Thomson is in the news again because he has turned ordinary skin cells into stem cells. How did he do this?