Miscellany
Fairy wren nestlings learn “passwords,” or unique single notes, from their mothers while still in their eggs; after birth they must use the passwords when calling for food, or the mothers will abandon the nest. In a 2012 study, scientists in Australia experimented with switching eggs and mothers, and found that passwords were not genetically inherited; the chicks assumed the passwords of their adopted mothers.
Miscellany
A 2013 study involving American college students found that participants were more likely to deem a face more attractive if it was presented amid a group of faces than if it was displayed alone. This “cheerleader effect,” scientists ventured, was “due to the averaging out of unattractive idiosyncrasies.” Two years later a similar study conducted with Japanese participants failed to replicate the results of the initial study.
Miscellany
Researchers at Yale and UC San Diego found that among a sample of almost two thousand subjects, none of them related, pairs of friends were significantly more likely to share gene variants than pairs of strangers; on average, close friends were the genetic equivalent of fourth cousins, making them “functional kin.” “Not only do we form ties with people superficially like ourselves,” said sociologist Nicholas Christakis, one of the study’s authors, “we form ties with people who are like us on a deep genetic level.”
Pages
