In this context papilla refers to the projection created by the tumor, not a tumor on an already existing papilla (such as the nipple).

Conventional wisdom claims that incumbent parties and politicians are punished by voters in times of economic distress. Throughout the campaign there was never any doubt about the position or tpopularity of Chancellor Angela Merkel.

Researchers take advantage of this fact by rigging up two rubber nipples, so that if a baby sucks on one, it hears a recording of its mother's voice on a pair of headphones, and if it sucks on the other nipple, it hears a recording of a female stranger's voice.