The research subjects ranged from cannibalistic flatworms to elderly patients in a Canadian psychiatric hospital.
The original choice of title was not made lightly, says Psychologist-Editor James McConnell, who heads the University of Michigan planarian (flatworm) research group, which .
If part of a flatworm's head is removed and grafted to a wound in another flatworm's body, a new head will indomitably sprout from the wound (see cut).