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Mass is
Cooperative Hunting
The action of different individuals or species working together to hunt prey, increasing their success rate compared to solo efforts.
Altruism
Behavior of an individual that benefits another at its own cost; in biology, it is often discussed in the context of evolutionary theory and social animals.
Prisoner's Dilemma
A fundamental problem in game theory showing why two individuals might not cooperate, even if it is in both their best interests to do so.
Slave-making Ants
Ant species that invade the colonies of other ants, capturing and forcing the captured ants to work for them.
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