How far will we go to make the perfect baby? It's a question scientists and ethicists have been asking ever since the birth of Louise Brown—the first child born via in vitro fertilization in 1978. Today is focused on an experiment conducted recently in China, where researchers attempted to alter every single gene in a group of growing embryos. The hope was that, if successful, the technique might enable doctors to extinguish all evidence of unhealthy genes—allowing their progeny to pass on the altered genes to their offspring—and effectively deleting disease from their family line. All ethical questions aside, this time, the experiment didn't work. Still, many think the Chinese scientists crossed the line. What's your opinion? Is this progress, or the first slide down a slippery slope? Let us know what you think in the comments.