http://www.pbs.org/wnet/innovation/episode6_essay1.html

What i learned from the article

Controversy
There are three main kinds of stem cells, they are "embryonic stem cells, embryonic "fetal" germ cells, and adult stem cells" (PBS.org). The most commonly used types of stem cells are the embryonic and adult cells.Stem cells may be useful but many people disagree with the idea of using them to fix the human body. People that disagree with stem cell researchers question the ability to use stem cells safely. Others argue that the use of stem cells is unethical and the idea of using human stem cells to treat wounds should not be aloud. Stem cells may be capable of changing the medical field forever but some question if it is moral to go as far as using human embryonic stem cells to save lives.

Adult Stem Cells
Adult stem cells are unlabeled cells that are located throughout the adult body. The adult stem cells work the same as all other stem cells and can change into any desired cell. The reason why adult stem cells are not widely used is because they are hard to find and there are not very many of them in a body. There are many attempts being made to farm the cells. These cells are farmed in either the human body or a specially made cell culture.

Embryonic Stem Cells
Embryonic stem cells come from two different places. The cells are either taken from eggs left over from vitro fertilization, or are cloned using nuclear transfer.

Questions this article rose...
If the leftover eggs from vitro fertilization are donated to researches then why do people diasagree with the use of leftover or designated eggs?

What is unsafe about the use of stem cells?

why not just use nuclear transfer to avoid angering anyone?

Helpful definitions
Vitro fertilization

Moral

Cell culture

Ethical