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The World’s Smartest Dog

Remembering Chaser, the border collie who learned more than 1,000 words.

Publish Date: Topic: NatureNatureNova
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Chaser, known to some as “the world’s smartest dog,” died on Tuesday, July 23, 2019 at the age of 15. The late John Pilley, formerly a psychologist at Wofford College, trained Chaser to tend a “herd” made up of more than 1,000 toys and remember the name of each item in the pile. In 2009, NOVA visited Chaser to test her vocabulary.

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National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers. Additional funding is provided by the NOVA Science Trust.