For the new study, reported in the 20 April issue of Science, animal communication researcher Karen McComb of the University of Sussex in Brighton, United Kingdom, and Sarah
Durant of the Institute of Zoology in London studied 20 small family groups of elephants, each typically containing several
females and their calves, in Kenya.
Since her release from prison in 1990,
Durant has been working for Women In Prison, a support group run by ex-offenders for
female prisoners.