U.S. Air Force Staff Sgt. Macy Benjamin, 355th Contracting Squadron contract administrator, performs a pull-up at the Haeffner Fitness and Sports Center at Davis-Monthan Air Force Base, Arizona, Aug.
The Barbados bullfinch and Carib grackle can pass the popular animal cognition test of string-pulling, but this ability may be unrelated to performance on six other cognitive tests, according a study ...
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