Chui estimates that Spears has rotated through at least five phones in recent months: the BlackBerry 8700c, LG enV, Sidekick LX, BlackBerry 8310 and, most recently, the Samsung u740.
Having created a morpholino for the env messenger molecule, Dr Dunlap injected it into a series of ewes eight days after they had mated and sat back to see what would happen.
At 16 days, the embryos and their associated membranes in the treated sheep were much smaller and more fragile than those of ewes that had been injected with morpholinos that do not interfere with env messengers, and were being used as controls.