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A Brief Glimpse at the Long Evolutionary History of Play

Gordon M. Burghardt

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Play, Playfulness, Creativity and Innovation

Patrick Bateson

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Why do Dolphins Play?

Stan A. Kuczaj II and Holli C. Eskelinen

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One Good Turn Deserves Another: Combat versus Other Functions of Acrobatic Maneuvers in the Play Fighting of Vervet Monkeys (Chlorocebus aethiops)

Sergio M. Pellis, Vivien C. Pellis, Louise Barrett, and S. Peter Henzi

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African Elephant Play, Competence and Social Complexity

Phyllis C. Lee and Cynthia J. Moss

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An Exploration of Play Behaviors in Raven Nestlings

Mathias Osvath, Helena Osvath, and Rasmus BÃ¥Ã¥th

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Adults Play but Not Like Their Young: The Frequency and Types of Play by Belugas (Delphinapterus leucas) in Human Care

Heather Hill and Domonique Ramirez

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Nosing Around: Play in Pigs

Kristina Horback

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Sub-adult Ravens Synchronize their Play: A Case of Emotional Contagion?

Mathias Osvath and Miriam Sima

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Beluga (Delphinapterus leucas) Novel Bubble Helix Play Behavior

Brittany L. Jones and Stan A. Kuczaj II

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