https://articlescad.com/10-lif....e-lessons-we-can-lea
https://boxcheese1.werite.net/....5-bird-african-grey-
Alex the African Grey Parrot Irene Pepperberg, an animal psychologist, bought Alex in 1977 from a pet store on the Northwest Side. She began an investigation lasting 30 years that would change our perception of the intelligence of avian species. Her research with him has challenged the belief that birds can only mimic human speech, without any understanding of meaning. What is Alex? At first, Alex
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