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https://postheaven.net/julysud....an3/5-must-know-prac
https://click4r.com/posts/g/18....594688/the-10-most-i
Alex the African Grey Parrot Irene Pepperberg, an animal psychologist, purchased Alex in 1977 from a pet shop on the Northwest Side. She began an ongoing study for 30 years that would alter our perception of the intelligence of birds. Her research on Alex challenged the common belief birds could only imitate human language without understanding the meaning. What is Alex? At first,