Altruism
11 years ago
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[{"text":"Hank explains the evolutionary basis for "},{"text":"altruistic","bold":true},{"text":" behavior in animals, including vampire bats! Like SciShow on Facebook:\u00a0..."}]
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{"title":"Altruism by SciShow 718,144 views 11 years ago 3 minutes, 29 seconds","duration":"3 minutes, 29 seconds"}