[tallhappy]

Adult brain stem cells could be studied as well.

They are. They are much harder to grow and isolate.

[<1/1,000,000th%]

They are. They are much harder to grow and isolate.

Not if you include the time and effort it takes to collect eggs and sperm and combine them, or collect them from the women they're growing in. ;)

[hocndoc]

If you read the post above about Dr. Yu, if you go to the WaPo, if you read this,
http://www.asheducationbook.org/cgi/content/full/2002/1/369
and this

http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=304108

you'll find that adult stem cells are proving easier, cheaper, and more useful research, as well as more ethical research.