环境作家卡尔‧萨非纳在新书《更胜言语：动物如何思考、如何感受》中提到动物也有意识等观点，鼓励我们打破与其他非人类动物之间的藩篱，深入了解和我们共享地球的这些可爱生物。
Testing Elephants Intelligence
Talking parrots and the origins of human intelligence
Parrot vs Child- The Intelligence Test
Unlocking the Genius of the Dog Who Knows a Thousand Words
First-Generation Americans Talk About The American Dream
Do You Work to Live or Live to Work?