"In her new book, Frankenstein's Cat: Cuddling up to Biotech's Brave New Beasts, science journalist Emily Anthes talks about how the landscape of bioengineering has expanded since Dolly the Sheep was cloned in 1996. Scientists, she says, are now working to create pigs that can grow organs for human transplant, goats that produce valuable protein-rich milk, and cockroaches that could potentially serve as tiny scouts into danger zones for the military.
One lab in China is even tackling the human genome by way of the mouse genome. There, researchers are randomly disabling mouse genes one at a time, in order to identify the function of each gene. By essentially throwing darts at a genetic dartboard to see what happens, the researchers have filled 45,000 mouse cages with mutant mice."