Science Makes Sex Obsolete

A team at the University of Pennsylvania has managed to grow mouse spermatagonial stem cells, cells that eventually become sperm. They have also been able to change the genetic program of these cells, allowing genetic changes to be passed down. Creation of sperm, programming of genes and fertilization of an egg can now all be done in a lab. Scary? For those who use in vitro fertilization, "designer babies" could be a very literal possibility.

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