Brazilians demonstrate against the use of embryos to carry out stem cell research outside the Supreme Court in Brasilia, May 28, 2008. Brazil's Supreme Court is expected to decide today whether or not to uphold legislation that allows research on embryonic stem cells in the world's largest Roman Catholic country. The poster reads, "Why use human embryos if science advances with adult stem cells?" REUTERS/Roberto Jayme (BRAZIL)
REUTERS/STRINGER/BRAZIL