How do you know that the cookies are still there even though they have been placed in a cookie jar out-of-sight? Scientists show that “object permanence” abilities in a cockatoo rivals that of apes and four-year-old humans.
How do you know that the cookies are still there even though they have been placed in a cookie jar out-of-sight? Scientists show that “object permanence” abilities in a cockatoo rivals that of apes and four-year-old humans.