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Humans Can’t Hear It, but Rats Giggle With Ultrasonic Joy When Tickled
Most people instinctively recoil at the sight of a rat, picturing a scruffy survivalist scavenging for scraps. However, biology suggests that these clever rodents are far more affectionate and joyful than their grim reputation implies. New research has uncovered a fascinating side to rat behavior, one where complex brain circuitry lights up not for food…