A belligerent chimpanzee in a Swedish zoo that stockpiles projectiles to hurl at visitors may be the first definitive proof that some animals can plan far ahead, researchers say. For years a male chimp named Santino has collected stones and other potential missiles into caches around his enclosure, which he returns to hours later when he wants to attack visitors. Researchers say the behavior proves that Santino was planning for the future because he
collected the stones in a calm state, prior to the zoo opening in the morning. The launching of the stones occurred hours later - during dominance displays to zoo visitors - with Santino in an "agitated" state [BBC News].
Lead researcher Mathias Osvath says the behavior reveals an advanced animal intelligence.
"These observations convincingly show that our fellow apes do consider the future in a very complex way.... It implies that they have a highly developed ...
