Viable Skin Cells Prove Difficult to Derive from Embryonic Stem Cells

Howard Green--who created the technique for culturing sheets of skin in vitro for transplant--and his colleagues at Harvard University set out to turn embryonic stem cells into keratinocytes and then isolate them. Unfortunately, it proved difficult to coax the stem cells to become skin cells in the first place. And those that did convert, Green says, grew poorly compared to donor skin cells.

Green Eggs and Green Ham

Scientists in Taiwan say they have bred three pigs that glow in the dark.

They claim that while other researchers have bred partly fluorescent pigs, theirs are the only pigs in the world which are green through and through.