Cezary Mackowski
Cezary Mackowski voted up Moga Deet's answer

Because you generally can't put animal cells in people and get the same outcome.  That's why transplanted organs have to come from people.

I'm don't understand the controversy.  The embryos are donated with the parent's consent and would have been discarded anyway.  The anti-choice people don't want you to realize that anti-choice means stopping many types … Read more